Weekly on Friday 12:30 pm - 1:30 pm, in PRB M2005

COMING UP!

12:30 pm
, Friday, Dec 2nd in PRB M2005 (Price Place)

   
    
Special Talk!

    
    Speaker: Shoko Miyake (National Institute of Technology, Ibaraki College)

    Title: The Solar Modulation of GCR: Possible Effect on the Time Variation in the Solar Gamma-Ray

    Abstract:
        Fermi-LAT observation revealed that the solar-disk gamma-ray flux is about 7 times higher than predicted during the solar minimum and it has a time dependence associated with the solar activity levels. While it is expected that the time dependence of the solar gamma-ray flux has relation to the time variations in the galactic cosmic-ray (GCR) flux and/or the solar magnetic field, the details are still unknown. It was observed that the latitudinal and radial dependence of the GCR flux changes with a solar activity levels by the heliospheric network of spacecraft, Pioneer 10/11, Voyager 1/2, Ulysses, and IMP-8. Therefore, there is a possibility that the GCR flux near the sun also may have a time variation and it may affect the resultant solar gamma-ray flux. I will present our results of the time variation in the GCR flux in the solar system calculated by using the drift model of the solar modulation, and discuss the possible effect of the solar modulation of GCR on the time variation of the solar gamma-ray.
  1. [Tim] An estimate of the DM profile in the Galactic bulge region
  2. [Shirley] A new Generation of Standard Solar Models
  3. Light Dark Matter in Superfluid Helium: Detection with Multi-excitation Production
  4. Strong constraint on hadronic models of blazar activity from Fermi and IceCube stacking analysis
  5. Discovery of Gamma-Ray Emission from the X-shaped Bulge of the Milky Way
  6. Evidence from stable isotopes and Be-10 for solar system formation triggered by a low-mass supernova
  7. Astrophysical Neutrino Production Diagnostics with the Glashow Resonance
  8. On the PeV knee of cosmic rays spectrum and TeV cutoff of electron spectrum
  9. A tale of dark matter capture, sub-dominant WIMPs, and neutrino observatories
  10. Constraining the monochromatic gamma-rays from dark matter annihilation by the LHC
  11. Hadronically decaying heavy dark matter and high-energy neutrino limits
  12. Light Dark Matter in Superfluid Helium: Detection with Multi-excitation Production
  13. Searches for correlation between UHECR events and high-energy gamma-ray Fermi-LAT data
  14. Nuclear pasta and supernova neutrinos at late times

2016

12:30 pm, Friday, Nov 18th in PRB M2005 (Price Place)
    
    Special Talk!

    
    Speaker: Francesco Capozzi (INFN)

    Title: Neutrino flavour conversions in supernova: recent developments

    Abstract: 
        The study of neutrino flavor evolution in supernovae has recently pointed out that relaxing the symmetries of the standard bulb model, which was commonly adopted until a few years ago for describing neutrino emission and propagation, might introduce instabilities in flavor space, which are exponentially growing in both time and space. In this talk I focus on two kind of instabilities. First I show that space and time inhomogeneities can excite flavor conversions at small spatial scales and can spontaneously generate a pulsating component in the flavor composition. In particular, the pulsation can compensate the suppression of flavor conversions induced by large matter effects. Then, I will discuss the so called “fast flavour conversions”, which develop a few meters from the supernova core, introducing both decoherence and flavour equilibration. If confirmed, both instabilities may have an important role in supernova explosion, such as in the shock reheating and in nucleosynthesis processes.
  1. [Mauricio] Discovery of a transient gamma-ray counterpart to FRB 131104
  2. [Mauricio] Fast Radio Bursts with Extended Gamma-Ray Emission?
  3. Realistic estimation for the detectability of dark matter sub-halos with Fermi-LAT
  4. Cross-correlation of weak lensing and gamma rays: implications for the nature of dark matter
  5. Prospects of Establishing the Origin of Cosmic Neutrinos using Source Catalogs
  6. The contribution of Fermi-2LAC blazars to the diffuse TeV-PeV neutrino flux
  7. Sterile Neutrinos and Flavor Ratios in IceCube
  8. Dark Cosmic Rays
  9. Selective Sommerfeld Enhancement of p-wave Dark Matter Annihilation


12:30 pm, Friday, Nov 11th in PRB M2005 (Price Place)
    
    Special Talk!

    
    Speaker: Anna Kwa (University of California, Irvine)

    Title: Hidden Sector Hydrogen as Dark Matter: Predictions for Small-scale Structure

    Abstract: 
        I will discuss the atomic physics and the astrophysical implications of a model in which the dark matter is the analog of hydrogen in a secluded sector. The self interactions between dark matter particles include both elastic scatterings as well as inelastic processes due to a hyperfine transition. The self-interaction cross sections are computed by numerically solving the coupled Schrodinger equations for this system. The velocity-dependence of the self-interaction cross sections produces the low dark matter density cores seen in spiral galaxies while maintaining consistency with constraints from observations of galaxy clusters. Significant cooling losses may occur due to inelastic excitations to the hyperfine state and subsequent decays (up to about 10% of the collisional heating rate) in this region of parameter space, with implications for the evolution of low mass halos and early growth of black holes. Finally, the minimum halo mass is in the range of 10^3 to 10^7 solar masses for viable regions of parameter space, which is significantly larger than the typical predictions for weakly-interacting dark matter models.
    
  1. [Shirley] The Doppler effect on indirect detection of dark matter using dark matter only simulations
  2. [Mauricio] A search for neutrinos from fast radio bursts with IceCube
  3. The Black Hole Mass Function from Gravitational Wave Measurements
  4. Final Results of the PICASSO Dark Matter Search Experiment
  5. Lack of nuclear clusters in dwarf sferoidal galaxies: implications for massive black holes formation and the cusp/core problem
  6. Constraints on atmospheric charmed-meson production from IceCube
  7. Tidal features of classical Milky Way satellites in a ΛCDM universe
  8. On Variations Of Pre-Supernova Model Properties
  9. Measurement of the attenuation length of argon scintillation light in the ArDM LAr TPC
  10. A map of the non-thermal WIMP
  11. First direct detection constraints on eV-scale hidden-photon dark matter with DAMIC at SNOLAB
  12. All-sky search for short gravitational-wave bursts in the first Advanced LIGO run
  13. Abell 2744: Too much substructure for Lambda CDM?


12:30 pm, Friday, Nov 4th in PRB M2005 (Price Place)
    
    Special Talk!
    
    Speaker: Vedran Brdar (Johannes Gutenberg University Mainz)

    Title: New physics in Supernovae

    Abstract: 
        Dark matter (DM) particles can be captured by stars via scattering on ordinary matter. As a benchmark 
    model for s-wave and p-wave annihilation we consider DM annihilation into dark photons and dark scalars 
    which further decay into SM particles. We trace DM capture and annihilation rates throughout the life of a 
    massive star and show that this evolution ends in an observable gamma ray flash. The special feature of 
    the model is that the photon flux from p-wave annihilation is stronger in comparison to the one from s-wave 
    process.
    
    Production of keV Sterile Neutrinos in Supernovae: New Constraints and Gamma Ray Observables
    Dark Gamma Ray Bursts
  1. Dark matter decay through gravity portals
  2. Design Overview of the DM Radio Pathfinder Experiment
  3. Conclusions about properties of high-energy cosmic-rays drawn with limited recourse to hadronic models
  4. Ultra diffuse galaxies outside clusters: clues to their formation and evolution
  5. Energetic constraints on electromagnetic signals from double black hole mergers
  6. Gravitational waves from merging intermediate-mass black holes : II Event rates at ground-based detectors
  7. One Law To Rule Them All: The Radial Acceleration Relation of Galaxies


12:30 pm, Friday, Oct 28th at PRB M2005 (Price Place)
  1. [Guanying] Novel Spectral Features in MeV Gamma Rays from Dark Matter
  2. Is the expansion of the universe accelerating? All signs point to yes
  3. The Highest-Energy Cosmic Rays Cannot be Dominantly Protons from Steady Sources
  4. An alternative Explanation for the Fermi GeV Gamma-Ray Excess
  5. Gamma Rays From Dark Matter Subhalos Revisited: Refining the Predictions and Constraints
  6. On the hypothesis that cosmological dark matter is composed of ultra-light bosons


12:30 pm, Friday, Oct 21st at PRB M2005 (Price Place)

12:30 pm, Friday, Oct 14th at PRB M2005 (Price Place)
  1. [Annika] An observer's guide to the (Local Group) dwarf galaxies: predictions for their own dwarf satellite populations
  2. [Mauricio] Testing decay of astrophysical neutrinos with incomplete information
  3. H→τ+τ−γ as a Probe of the τ Magnetic Dipole Moment
  4. One-point fluctuation analysis of the high-energy neutrino sky
  5. Fast Pairwise Conversion of Supernova Neutrinos: Dispersion-Relation Approach
  6. Cosmic ray composition measurements and cosmic ray background free gamma-ray observations with Cherenkov telescopes
  7. Hyperluminal Signatures in the Afterglows of Gamma-Ray Bursts 980425 and 030329
  8. An Experiment to Demonstrate Cherenkov / Scintillation Signal Separation
  9. First results from a microwave cavity axion search at 24 micro-eV
  10. The High Rate of the Boyajian's Star Anomaly as a Phenomenon
  11. Novel dark matter constraints from antiprotons in the light of AMS-02




12:30 pm, Friday, Sept 30th at PRB M2005 (Price Place)


Special talk!

Speaker :  Rafael Batista (University of Oxford)

Title: Modelling the propagation of ultra-high-energy cosmic rays

Abstract: 
The origin and nature of the ultra-high-energy cosmic rays (UHECRs) is one of the main challenges astroparticle physics. 
I will discuss the difficulties in modelling the propagation of ultra-high-energy cosmic rays, given our limited knowledge of 
the extragalactic background light, photonuclear interactions, and cosmic magnetic fields. Particularly, I will focus on the 
influence of magnetic fields on the propagation, and discuss the prospects for UHECR astronomy in light of results of 
numerical simulations of cosmic ray propagation in the magnetised cosmic web.

  1. [Tim] H.E.S.S. limits on line-like dark matter signatures in the 100 GeV to 2 TeV energy range close to the Galactic Centre
  2. [Bianca] A chronicle of galaxy mass assembly in the EAGLE simulation
  3. On the difference between gamma-ray-detected and non-gamma-ray-detected pulsars
  4. Late time cooling of neutron star transients and the physics of the inner crust
  5. Time-dependent search for neutrino emission from x-ray binaries with the ANTARES telescope
  6. Baryogenesis via leptonic CP-violating phase transition
  7. Identifying Ultrahigh-Energy Cosmic-Ray Accelerators with Future Ultrahigh-Energy Neutrino Detectors
  8. Evidence for a mixed mass composition at the `ankle' in the cosmic-ray spectrum
  9. A Testable Conspiracy: Simulating Baryonic Effects on Self-Interacting Dark Matter Halos
  10. The Infrared-Gamma-Ray Connection: A WISE View of the Extragalactic Gamma-Ray Sky


12:30 pm, Friday, Sept 23th at PRB M2005 (Price Place)

  1. TeVPA AMS results
  2. [Brian] Search for Ultra-relativistic Magnetic Monopoles with the Pierre Auger Observatory
  3. [Mauricio] All-sky search for time-integrated neutrino emission from astrophysical sources with 7 years of IceCube data
  4. [Shirley] The Log Log Prior for the Frequency of Extraterrestrial Intelligences
  5. On the Lack of a Radio Afterglow from Some Gamma-ray Bursts - Insight into Their Progenitors?
  6. The Final Fates of Accreting Supermassive Stars
  7. Directional Searches at DUNE for Sub-GeV Monoenergetic Neutrinos Arising from Dark Matter Annihilation in the Sun
  8. Three-dimensional distribution of ejecta in Supernova 1987A at 10 000 days
  9. Emission of Photons and Relativistic Axions from Axion Stars
  10. A new observable in extensive air showers
  11. Unbiased constraints on ultralight axion mass from dwarf spheroidal galaxies
  12. XENON100 Dark Matter Results from a Combination of 477 Live Days
  13. Probing nonstandard neutrino cosmology with terrestrial neutrino experiments






12:30 pm, Friday, Sept 9th at PRB M2005 (Price Place)

  1. [Bianca] A High Stellar Velocity Dispersion and ~100 Globular Clusters for the Ultra Diffuse Galaxy Dragonfly 44
  2. [Bei] Nonmaximal neutrino mixing at NOvA from nonstandard interactions
  3. [Kenny] (Almost) Closing the Sterile Neutrino Dark Matter Window with NuSTAR
  4. Fast neutrino flavor conversions near the supernova core with realistic flavor-dependent angular distributions
  5. Modeling the gamma-ray emission in the Galactic Center with a fading cosmic-ray accelerator
  6. Microlensing and dynamical constraints on primordial black hole dark matter with an extended mass function
  7. Axion star collisions with Neutron stars and Fast Radio Bursts
  8. The shape of the inner Milky Way halo from observations of the Pal 5 and GD-1 stellar streams
  9. First search for dark matter annihilations in the Earth with the IceCube Detector


12:30 pm, Friday, Sept 2nd at PRB M2005 (Price Place)

Special talk!

Speaker :  Zijie Poh (OSU)
Title: Data Science Summer Internship at Capital One
Abstract: 
In this INFORMAL talk, I will share my internship experience at Capital One. 
Specifically, I will share my perspective of data science, how to prepare for a 
Data Science internship/career, and the application/interview process that I 
went through.
  1. In the Wake of Dark Giants: New Signatures of Dark Matter Self Interactions in Equal Mass Mergers of Galaxy Clusters
  2. The angular power spectrum of the diffuse gamma-ray emission as measured by the Fermi Large Area Telescope and constraints on its Dark Matter interpretation
  3. Stacked search for time shifted high energy neutrinos from gamma ray bursts with the \ANTARES neutrino telescope
  4. Search for Blazar Flux-Correlated TeV Neutrinos in IceCube 40-String Data
  5. Search for Neutrinos in Super-Kamiokande associated with Gravitational Wave Events GW150914 and GW151226
  6. High-Energy Neutrino Emission from White Dwarf Mergers
  7. Results from a search for dark matter in LUX with 332 live days of exposure
  8. Pulsational-Pair Instability Supernovae
  9. Galactic Cosmic Ray Origins and OB Associations: Evidence from SuperTIGER Observations of Elements 26Fe through 40Zr
  10. Direct Detection of Dark Matter Bound to the Earth
  11. The impact of baryonic physics on the subhalo mass function and implications for gravitational lensing
  12. Dwarf spheroidal J-factors without priors: A likelihood-based analysis for indirect dark matter searches












11:30 am, Friday, July 29th at PRB M2005 (Price Place)

  1. Observation and Characterization of a Cosmic Muon Neutrino Flux from the Northern Hemisphere using six years of IceCube data
  2. Dark Matter Results from First 98.7-day Data of PandaX-II Experiment
  3. Hitomi constraints on the 3.5 keV line in the Perseus galaxy cluster
  4. Nuclear Physics Meets the Sources of the Ultra-High Energy Cosmic Rays
  5. Search for dark matter annihilations towards the inner Galactic halo from 10 years of observations with H.E.S.S
  6. Decaying dark matter search with NuSTAR deep sky observations
  7. Search for low-mass WIMPs in a 0.6 kg day exposure of the DAMIC experiment at SNOLAB
  8. Searching for axion-like particles with ultra-peripheral heavy-ion collisions
  9. Cumulative neutrino background from quasar-driven outflows
  10. Quasar-driven outflows account for the missing extragalactic gamma-ray background
  11. The cold dark matter content of Galactic dwarf spheroidals: no cores, no failures, no problem




11:30 am, Friday, July 22nd at PRB M2005 (Price Place)

  1. LUX talk at IDM
  2. LZ talk at IDM
  3. Constraints on ultra-high-energy cosmic ray sources from a search for neutrinos above 10 PeV with IceCube
  4. A Common Origin for Globular Clusters and Ultra-faint Dwarfs in Simulations of the First Galaxies
  5. Search for Sources of High Energy Neutrons with Four Years of Data from the IceTop Detector
  6. Dark Gamma Ray Bursts
  7. A search for low-energy neutrino and antineutrino signals correlated with gamma-ray bursts with Borexino
  8. How bright is the proton? A precise determination of the photon PDF
  9. High-energy gamma-rays in the hard spectral state of Cyg X-1
  10. Inference of Unresolved Point Sources At High Galactic Latitudes Using Probabilistic Catalogs
  11. The Quiescent Intracluster Medium in the Core of the Perseus Cluster
  12. Studying generalised dark matter interactions with extended halo-independent methods
  13. Detecting supernova neutrinos with iron and lead detectors
  14. Improved Measurement of the Reactor Antineutrino Flux and Spectrum at Daya Bay
  15. Early-time signatures of γ-ray emission from supernovae in dense circumstellar media
  16. Revision of the LHCb Limit on Majorana Neutrinos




11:30 am, Friday, July 8th at PRB M2005 (Price Place)

  1. Neutrino2016!
  2. Supernova neutrino physics with xenon dark matter detectors: A timely perspective
  3. High-energy neutrinos from sources in clusters of galaxies
  4. Constraining High-Energy Cosmic Neutrino Sources: Implications and Prospects
  5. Improved Constraints on Dark Matter Annihilation to a Line using Fermi-LAT observations of Galaxy Clusters
  6. Cascade photons as test of protons in UHECR
  7. First Constraints on the Complete Neutrino Mixing Matrix with a Sterile Neutrino
  8. Prompt atmospheric neutrino fluxes: perturbative QCD models and nuclear effects
  9. Direct Detection of sub-GeV Dark Matter with Scintillating Targets
  10. A search for sterile neutrinos mixing with muon neutrinos in MINOS
  11. Synchrotron Emission from Dark Matter Annihilation: Predictions for Constraints from Non-detections of Galaxy Clusters with New Radio Surveys


11:30 am, Friday, July 1st at PRB M2005 (Price Place)

  1. The Gamma-Ray Pulsar Population of Globular Clusters: Implications for the GeV Excess
  2. Time dependence of the electron and positron components of the cosmic radiation measured by the PAMELA experiment between July 2006 and December 2015
  3. A Unified Model for GRB Prompt Emission from Optical to Gamma-Rays; a New Type of Standard Candle
  4. Lines and Boxes: Unmasking Dynamical Dark Matter through Correlations in the MeV Gamma-Ray Spectrum
  5. Under Pressure: Quenching Star Formation in Low-Mass Satellite Galaxies via Stripping
  6. Measurement of the 2νββ decay half-life of 150Nd and a search for 0νββ decay processes with the full exposure from the NEMO-3 detector
  7. Solar Neutrino Measurements in Super-Kamiokande-IV
  8. How to save the WIMP: global analysis of a dark matter model with two s-channel mediators
  9. Exploring Systematic Effects in the Relation Between Stellar Mass, Gas Phase Metallicity, and Star Formation Rate
  10. Directional Detection of Dark Matter with 2D Targets
  11. Production of highly-polarized positrons using polarized electrons at MeV energies
  12. FIRST LIGHT: MeV ASTROPHYSICS FROM THE MOON



11:30 am, Friday, June 17th at PRB M2005 (Price Place)

  1. Multi-messenger light curves from gamma-ray bursts in the internal shock model
  2. Indirect Detection Constraints on s and t Channel Simplified Models of Dark Matter
  3. GW151226: Observation of Gravitational Waves from a 22-Solar-Mass Binary Black Hole Coalescence
  4. Sub-Femto-g Free Fall for Space-Based Gravitational Wave Observatories: LISA Pathfinder Results
  5. Deciphering Contributions to the Extragalactic Gamma-Ray Background from 2 GeV to 2 TeV
  6. Latest MAGIC discoveries pushing redshift boundaries in VHE Astrophysics
  7. The Extraordinary Amount of Substructure in the Hubble Frontier Fields Cluster Abell 2744
  8. Sensitivity of the space-based CHerenkov from Astrophysical Neutrinos Telescope (CHANT)
  9. Fermi Large Area Telescope Detection of Extended Gamma-Ray Emission from the Radio Galaxy Fornax A
  10. Unitarisation of EFT Amplitudes for Dark Matter Searches at the LHC
  11. Detecting Asymmetric Dark Matter in the Sun with Neutrinos




11:30 am, Friday, June 3rd at PRB M2005 (Price Place)

  1. Multi-PeV Signals from a New Astrophysical Neutrino Flux Beyond the Glashow Resonance
  2. Dark Forces in the Sky: Signals from Z' and the Dark Higgs
  3. All-flavour Search for Neutrinos from Dark Matter Annihilations in the Milky Way with IceCube/DeepCore
  4. Non-standard neutrino interactions in the Earth and the flavor of astrophysical neutrinos
  5. Probing axions with the neutrino signal from the next galactic supernova
  6. False Signals of CP-Invariance Violation at DUNE
  7. Analysis strategies for general spin-independent WIMP-nucleus scattering
  8. The effect of lensing magnification on the apparent distribution of black hole mergers
  9. The shape of the extragalactic cosmic ray spectrum from Galaxy Clusters
  10. Neutrino Quantum Kinetic Equations: The Collision Term
  11. Reducing the Solar Neutrino Background Using Polarised Helium-3



11:30 am, Friday, May 20th at PRB M2005 (Price Place)

  1. On the Charm Contribution to the Atmospheric Neutrino Flux
  2. What does the Bullet Cluster tell us about Self-Interacting Dark Matter?
  3. Complex Analysis of Askaryan Radiation: A Fully Analytic Treatment including the LPM effect and Cascade Form Factor
  4. Constraints on MACHO Dark Matter from the Star Cluster in the Dwarf Galaxy Eridanus II
  5. Identifying true satellites of the Magellanic Clouds
  6. Octant of θ23 in danger with a light sterile neutrino
  7. Statistical Measurement of the Gamma-ray Source-count Distribution as a Function of Energy
  8. The gap of stellar mass in galaxy groups: another perspective of the Too-big-To-Fail problem in the Milky Way
  9. On the improvement of cosmological neutrino mass bounds
  10. How to calculate dark matter direct detection exclusion limits that are consistent with gamma rays from annihilation in the Milky Way halo


11:30 am, Friday, May 13th at PRB M2005 (Price Place)

  1. Halzen's Pheno talk
  2. The connection between the host halo and the satellite galaxies of the Milky Way
  3. Search for Majorana Neutrinos near the Inverted Mass Hierarchy region with KamLAND-Zen
  4. Searches for Sterile Neutrinos with the IceCube Detector
  5. On the Charm Contribution to the Atmospheric Neutrino Flux
  6. Neutrinos from Type Ia Supernovae I: The Deflagration-To-Detonation Transition Scenario
  7. Testing keV sterile neutrino dark matter in future direct detection experiments
  8. Searching for the 3.5 keV Line in the Stacked Suzaku Observations of Galaxy Clusters
  9. Analysis of the 4-year IceCube HESE data
  10. Measurement of the Radiation Energy in the Radio Signal of Extensive Air Showers as a Universal Estimator of Cosmic-Ray Energy
  11. Development Toward a Ground-Based Interferometric Phased Array for Radio Detection of High Energy Neutrinos
  12. Sensitivity Projections for Dark Matter Searches with the Fermi Large Area Telescope
  13. The masses of the neutrinos



11:30 am, Friday, May 6th at PRB M2005 (Price Place)

Special Seminar
Time: 11:30 - 12:00

Speaker :  Juri Smirnov (Max Planck Institute Heidelberg)
Title:          Light from Dark Matter
Abstract:
In this talk I will discuss photon spectra from annihilating Dark Matter. In particular the search for monochromatic lines is of great interest, as from the particle physics perspective it allows to determine the DM mass.  And from the astrophysical perspective it is unlikely to be mimicked by  a compact source. 
I will address the general question, under which circumstances in a given model a line is in principle observable given a finite instrument resolution. Two mechanisms which allow to see such gamma line features will be presented and the corresponding model realisations discussed.
I will discuss how line searches open the window of possibility to  scrutinise possible observed continuous gamma ray excesses. As concrete examples the Galactic Center excess and the Reticulum II excess will be considered. 

Based on:  
1510.07562, 1509.04282, 1508.04418, 1508.1425, 1506.05107 

Papers this week
  1. Observation of the 60Fe nucleosynthesis-clock isotope in galactic cosmic rays
  2. Lensing of Fast Radio Bursts as a Probe of Compact Dark Matter
  3. Production of keV Sterile Neutrinos in Supernovae: New Constraints and Gamma Ray Observables
  4. Terrestrial matter effects on reactor antineutrino oscillations at JUNO or RENO-50: how small is small?
  5. Lowering IceCube's Energy Threshold for Point Source Searches in the Southern Sky
  6. Multi-TeV gamma-rays and neutrinos from the Galactic Center region
  7. How Unequal Fluxes of High Energy Astrophysical Neutrinos and Antineutrinos can Fake New Physics
  8. On the Detectability of Light Dark Matter with Superfluid Helium
  9. The Galactic Center: A PeV Cosmic Ray Acceleration Factory
  10. An Empirical Determination of the Intergalactic Background Light from UV to FIR Wavelengths Using FIR Deep Galaxy Surveys and the Gamma-ray Opacity of the Universe
  11. 3FGL Demographics Outside the Galactic Plane using Supervised Machine Learning: Pulsar and Dark Matter Subhalo Interpretations
  12. How well can new particles interacting with neutrinos be constrained after a galactic supernova?
  13. Dark matter annihilation with s-channel internal Higgsstrahlung
  14. Constraining the nature of dark matter with the star formation history of the faintest Local Group dwarf galaxy satellites














11:30 am, Friday, April 1st at PRB M2005 (Price Place)
  1. Enhanced Tidal Stripping of Satellites in the Galactic Halo from Dark Matter Self-Interactions
  2. First Identification of Direct Collapse Black Hole Candidates in the Early Universe in CANDELS/GOODS-S
  3. Inclusive Dark Photon Search at LHCb
  4. A New Method for Finding Point Sources in High-energy Neutrino Data
  5. A burst in a wind bubble and the impact on external matter: high-energy gamma-ray flares and implications for fast radio bursts and pulsar-driven supernovae
  6. Evidence against star-forming galaxies as the dominant source of IceCube neutrinos
  7. Resolving the Extragalactic γ-ray Background above 50 GeV with Fermi-LAT
  8. Discovery of a new extragalactic source population of energetic particles
  9. New H.E.S.S. diffuse emission from the Galactic center: a combination of heavy dark matter and millisecond pulsars?



11:30 am, Friday, Mar 25th at PRB M2005 (Price Place)
  1. Improved Cosmic-Ray Injection Models and the Galactic Center Gamma-Ray Excess
  2. Constraining Gamma-Ray Emission from Luminous Infrared Galaxies with Fermi-LAT; Tentative Detection of Arp 220
  3. First detection of GeV emission from an ultraluminous infrared galaxy Arp 220 with the Fermi Large Area Telescope
  4. Search for spectral irregularities due to photon-axion-like particle oscillations with the Fermi Large Area Telescope
  5. A Latitude-Dependent Analysis of the Leptonic Hypothesis for the Fermi Bubbles
  6. Galactic and extragalactic contributions to the astrophysical muon neutrino signal
  7. A successful solar model using new solar composition data
  8. Evidence of Fermi bubbles around M31
  9. Discovery of a new extragalactic source population of energetic particles
  10. New H.E.S.S. diffuse emission from the Galactic center: a combination of heavy dark matter and millisecond pulsars?





11:30 am, Friday, Mar 11th at PRB M2005 (Price Place)


11:30 am, Friday, Mar 4th at PRB M2005 (Price Place)

  1. Neutrino mass without cosmic variance
  2. Antineutrino emission and gamma background characteristics from a thermal research reactor
  3. PeV-Scale Dark Matter as a Thermal Relic of a Decoupled Sector
  4. Extending Fermi-LAT and H.E.S.S. Limits on Gamma-ray Lines from Dark Matter Annihilation
  5. Did LIGO detect dark matter?
  6. Search for VHE gamma-ray emission from Geminga pulsar and nebula with the MAGIC telescopes
  7. Annual Cosmic Ray Spectra from 250 MeV up to 1.6 GeV from 1995 - 2014 Measured With the Electron Proton Helium Instrument onboard SOHO
  8. TeV Gamma-ray Observations of The Galactic Center Ridge By VERITAS
  9. Localization and broadband follow-up of the gravitational-wave transient GW150914
  10. Neutrino oscillations in the presence of super-light sterile neutrinos
  11. Impact of nonstandard interactions on sterile neutrino searches at IceCube
  12. Probing Neutrino Mass Hierarchy by Comparing the Charged-Current and Neutral-Current Interaction Rates of Supernova Neutrinos
  13. High Energy Neutrinos from the Gravitational Wave event GW150914 possibly associated with a short Gamma-Ray Burst
  14. Positron annihilation signatures associated with the outburst of the microquasar V404 Cygni


11:30 am, Friday, Feb 26th at PRB M2005 (Price Place)

  1. Is The Gamma-Ray Source 3FGL J2212.5+0703 A Dark Matter Subhalo?
  2. A Fast Radio Burst Host Galaxy
  3. Development of the Model of Galactic Interstellar Emission for Standard Point-Source Analysis of Fermi Large Area Telescope Data
  4. Ultrahigh Energy Cosmic Rays and Black Hole Mergers
  5. Isotropic extragalactic flux from dark matter annihilations: lessons from interacting dark matter scenarios
  6. A search for Secluded Dark Matter in the Sun with the ANTARES neutrino telescope
  7. How far are the sources of IceCube neutrinos? Constraints from the diffuse TeV gamma-ray background
  8. Ultrafast Outflows from Black Hole Mergers with a Mini-Disk
  9. Search for gamma-ray line feature from a group of nearby Galaxy clusters with Fermi LAT Pass 8 data
  10. On the "GeV excess" in the diffuse γ-ray emission towards the Galactic Center
  11. Testing the equivalence principle and Lorentz invariance with the PeV neutrino from blazar PKS B1424-418
  12. Gamma-ray Limits on Neutrino Lines
  13. Reconciling dwarf galaxies with LCDM cosmology: Simulating a realistic population of satellites around a Milky Way-mass galaxy

11:30 am, Friday, Feb 19th at PRB M2005 (Price Place)

  1. GW150914: First results from the search for binary black hole coalescence with Advanced LIGO
  2. Properties of the binary black hole merger GW150914
  3. The Rate of Binary Black Hole Mergers Inferred from Advanced LIGO Observations Surrounding GW150914
  4. Astrophysical Implications of the Binary Black-Hole Merger GW150914
  5. A Dark Energy Camera Search for an Optical Counterpart to the First Advanced LIGO Gravitational Wave Event GW150914
  6. A new constraint on millicharged dark matter from galaxy clusters
  7. TeV gamma-ray emission initiated by the population or individual millisecond pulsars within globular clusters
  8. Electromagnetic Counterparts to Black Hole Mergers Detected by LIGO
  9. The \textit{Fermi}-LAT gamma-ray excess at the Galactic Center in the singlet-doublet fermion dark matter model
  10. Photons, Photon Jets and Dark Photons at 750\,GeV and Beyond
  11. No ν floors: Effective field theory treatment of the neutrino background in direct dark matter detection experiments
  12. First Search for a Dark Matter Annual Modulation Signal with NaI(Tl) in the Southern Hemisphere by DM-Ice17

11:30 am, Friday, Feb 12th at PRB M2005 (Price Place)


11:30 am, Friday, Feb 5th at PRB M2005 (Price Place)

  1. Astrophysical constraints on resonantly produced sterile neutrino dark matter
  2. New Spectral Features from Bound Dark Matter
  3. Constraints on Axions and Axionlike Particles from Fermi Large Area Telescope Observations of Neutron Stars
  4. Young and middle age pulsar light-curve morphology: Comparison of Fermi observations with gamma-ray and radio emission geometries
  5. Sterile Neutrino Fits to Short Baseline and IceCube Data
  6. A Search for Neutral Current Single Gamma with ND280 at T2K
  7. Measuring the neutron star equation of state using X-ray timing
  8. Neutrino Interactions with Nucleons and Nuclei: Importance for Long Baseline Experiments
  9. Self-induced neutrino flavor conversion without flavor mixing
  10. Ruling out the light WIMP explanation of the galactic 511 keV line
  11. A Broadband Approach to Axion Dark Matter Detection
  12. Invited Article: miniTimeCube


11:30 am, Friday, Jan 29th at PRB M2005 (Price Place)

Special Seminar
Time: 11:30 am 
Speaker: Joseph Bramante (Notre Dame)

Title: Dark Matter Ignition of Type Ia Supernovae and the R-Process Abundance of Reticulum II

Abstract: Recent studies of low-redshift type Ia supernovae indicate that half explode from sub-Chandrasekhar mass progenitor white dwarfs. This talk explains how asymmetric dark matter would ignite sub-Chandrasekhar white dwarfs, and form star-destroying black holes inside old neutron stars inhabiting regions densely populated with dark matter. The anomalously high r-process abundance of Reticulum II and explanations thereof, including dark-matter-induced neutron star implosions, will also be discussed.

  1. Young and Millisecond Pulsar GeV Gamma-ray Fluxes from the Galactic Center and Beyond
  2. Constraints on dark matter annihilation to fermions and a photon
  3. An All-Sky Search for Three Flavors of Neutrinos from Gamma-Ray Bursts with the IceCube Neutrino Observatory
  4. Limits to dark matter annihilation cross-section from a combined analysis of MAGIC and Fermi-LAT observations of dwarf satellite galaxies
  5. Extragalactic plus Galactic model for IceCube neutrino events
  6. Extreme blazars as counterparts of IceCube astrophysical neutrinos
  7. Dark matter subhalos and unidentified sources in the Fermi 3FGL source catalog
  8. On the R-Process Enrichment of Dwarf Spheroidal Galaxies
  9. Measurement of Partonic Nuclear Effects in Deep-Inelastic Neutrino Scattering using MINERvA
  10. Constraining pion interactions at very high energies by cosmic ray data
  11. The feeble giant. Discovery of a large and diffuse Milky Way dwarf galaxy in the constellation of Crater




1:00 pm, Friday, Jan 15th at PRB M2005 (Price Place)

Special Seminar
Time: 1:00 pm 
Speaker: Andrea Albert (SLAC)

Title:Diffuse gamma-ray emission modeling near the Galactic Center and the 3 GeV excess

Abstract: Several groups have reported excess emission in gamma rays peaking around 3 GeV relative to expectations from conventional models for the interstellar emission in the Galactic Center (GC). We study the uncertainty of the excess emission in Pass 8 Fermi-LAT data due to modeling of the various emission components in that direction. In particular, we quantify the uncertainties on the excess by refitting with several GALPROP models of Galactic diffuse emission, an alternative distribution of gas along the line of sight based on starlight extinction data, a model of the Fermi bubbles at low latitudes, and including templates for additional sources of cosmic-ray electrons near the GC.  In all models that we have tested the excess emission remains significant.  The origin of the excess is currently uncertain.  To test the robustness of a dark-matter interpretation, we perform fits in controls regions along the Galactic Plane.  The uncertainties from our fits in control regions have a similar relative size as the excess in the GC. Therefore a non-dark-matter explanation cannot be ruled out and we consequently set limits on the dark matter annihilation cross section.





Fall 2015



11:30 am, Friday, Dec 18th at PRB M2005 (Price Place)
  1. Search for new physics in high mass diphoton events in proton-proton collisions at 13TeV
  2. Search for resonances decaying to photon pairs in 3.2 fb−1 of pp collisions at s√ = 13 TeV with the ATLAS detector
  3. Resonant Sterile Neutrino Dark Matter in the Local and High-z Universe
  4. Properties of Resonantly Produced Sterile Neutrino Dark Matter Subhalos
  5. The inner structure of dwarf sized halos in Warm and Cold Dark Matter cosmologies
  6. Prospects for detection of target-dependent annual modulation in direct dark matter searches
  7. Improved WIMP scattering limits from the LUX experiment
  8. A practical theorem on using interferometry to measure the global 21-cm signal
  9. The Gamma-Ray Luminosity Function of Millisecond Pulsars and Implications for the GeV Excess
  10. Ultra-high-energy-cosmic-ray hot spots from tidal disruption events




11:30 am, Friday, Dec 4th at PRB M2005 (Price Place)
  1. Model-Independent Indirect Detection Constraints on Hidden Sector Dark Matter
  2. Wavelet-Based Techniques for the Gamma-Ray Sky
  3. Search for correlations between the arrival directions of IceCube neutrino events and ultrahigh-energy cosmic rays detected by the Pierre Auger Observatory and the Telescope Array
  4. NIHAO V: Too big doesn't fail -- reconciling the conflict between LCDM predictions and the circular velocities of nearby field galaxies
  5. An assessment of the "too big to fail" problem for field dwarf galaxies in view of baryonic feedback effects
  6. The Effects of Dark Matter Annihilation on Cosmic Reionization
  7. Prospects for dark matter detection with inelastic transitions of xenon
  8. A search for cosmogenic production of β-neutron emitting radionuclides in water
  9. IceCube Constraints on Fast-Spinning Pulsars as High-Energy Neutrino Sources
  10. Search of MeV-GeV counterparts of TeV sources with AGILE in pointing mode





11:30 am, Friday, Nov 20th at PRB M2005 (Price Place)

Special Seminar
Time: 11:30- 12:00 
Speaker: Peter Denton (Vanderbilt)

Title:Cosmic Ray Anisotropy with Partial Sky Exposure

Abstract: UHECRs are the highest energy particles in the universe, yet very little is known about them. Their composition, sources, acceleration, and propagation details are all wholly unknown. The first step to addressing this problem is determining the sources, which requires measuring an anisotropy. Above $E\sim55$ EeV, anisotropies are expected to appear due to the GZK horizon, yet no definitive signal has been seen. Here I overview the current experimental status and present a discussion of anisotropy reconstruction techniques, along with their strengths and weaknesses. I use spherical harmonics as a general tool to detect large scale anisotropies in a low statistics environment. I compare the benefits of a full sky experiment such as JEM-EUSO to ground based partial sky experiments such as the Pierre Auger Observatory and Telescope Array. I show that while Auger can reconstruct a quadrupole without a partial sky penalty, partial sky exposure generally leads to a loss of precision beyond that just from lower statistics compared to a full sky experiment.


11:30 am, Friday, Nov 13th at PRB M2005 (Price Place)
  1. Problems and Prospects from a Flood of Extragalactic TeV Neutrinos in IceCube
  2. First combined search for neutrino point-sources in the Southern Hemisphere with the ANTARES and IceCube neutrino telescopes
  3. Flaring of tidally compressed dark-matter clumps
  4. Presupernova neutrinos: realistic emissivities from stellar evolution
  5. Fermi-LAT Observations of High-Energy Gamma-Ray Emission Toward the Galactic Center
  6. Sensitivity to oscillation with a sterile fourth generation neutrino from ultra-low threshold neutrino-nucleus coherent scattering
  7. The IceCube Neutrino Observatory, the Pierre Auger Observatory and the Telescope Array: Joint Contribution to the 34th International Cosmic Ray Conference (ICRC 2015)
  8. Pierre Auger Observatory and Telescope Array: Joint Contributions to the 34th International Cosmic Ray Conference (ICRC 2015)


11:30 am, Friday, Nov 6th at PRB M2005 (Price Place)

Special Seminar
Time: 11:30- 12:00 
Speaker: Tathagata Ghosh (TAMU)

Title: Limits on cascade annihilation models and decaying dark matter lifetime from dwarf galaxies using Fermi-LAT

Abstract: Dwarf spheroidal galaxies are promising targets for the indirect detection of dark matter through gamma-ray emission due to their proximity, lack of astrophysical backgrounds and high dark matter density. They are often used to place restrictive bounds on the dark matter annihilation cross section. Many particle dark matter models predict that the dark matter undergoes cascade annihilations, i.e. the annihilation products are 4-body final states. In the context of model-independent cascade annihilation models, we review the compatibility of the dark matter interpretation of the Fermi-LAT Galactic center gamma-ray emission with null detections from dwarf spheroidal galaxies using six years of Fermi-LAT data. In addition, we present the analysis of data from 20 Dwarf Spheroidal galaxies and derivation from a stacked analysis, robust 95% confidence level upper limits on the dark matter lifetime for several decay channels and dark matter masses between 10 GeV and 10 TeV.

  1. A Tale of Two Pulsars and the Origin of TeV Gamma Rays from the Galactic Center
  2. Gamma Rays, Electrons, Hard X-Rays, and the Central Parsec of the Milky Way
  3. Searches for Relativistic Magnetic Monopoles in IceCube
  4. The Absolute Rate of LGRB Formation
  5. The Relative Rate of LGRB Formation as a Function of Metallicity
  6. Evidence against star-forming galaxies as the dominant source of IceCube neutrinos
  7. Resolving the Extragalactic γ-ray Background above 50 GeV with Fermi-LAT
  8. Search for Gamma-Ray Lines towards Galaxy Clusters with the Fermi-LAT
  9. Neutron capture and the antineutrino yield from nuclear reactors
  10. Measurement of θ13 in Double Chooz using neutron captures on hydrogen with novel background rejection techniques
  11. Global Constraints on a Heavy Neutrino
  12. The origin of IceCube's neutrinos: Cosmic ray accelerators embedded in star forming calorimeters
  13. A Predictive Analytic Model for the Solar Modulation of Cosmic Rays


11:30 am, Friday, Oct 30th at PRB M2005 (Price Place)

Special Seminar
Time: 11:30- 12:00 
Speaker: Gregory Dooley (MIT)

Title: The effect of Self-Interacting Dark Matter on tidal stripping in satellite galaxies and the galactic halo

Abstract: Observations of low surface brightness galaxies, low mass spiral galaxies, and Miky Way dwarf 
spheroidals indicate that the central density of galaxies is lower than predicted in pure CDM simulations. 
Self-interacting dark matter offers one possible explanation to the formation of low density cores in galactic 
halos. Particles are allowed to elastically scatter, and in the higher density central regions of galaxies, an 
 increased scattering rate tends to drive out mass, transforming cusps into cores. Motivated by the lower 
binding energy of cores vs. cusps, we investigate the effect that SIDM has on the tidal stripping of mass 
in satellite galaxies around a Milky Way analog. Using n-body, dark matter only simulations of four different 
models of SIDM, two of constant cross section and two with a velocity-dependent cross section, we 
demonstrate that while the stripping of total bound dark matter mass is not significantly affected by permitted 
SIDM models, the the stellar mass loss rate is appreciably increased. This implies a depression in the 
satellite luminosity function in halos that pass within 50 kpc of their host. I will also present results that 
 differentiate the models which need further investigation.



11:30 am, Friday, Oct 23rd at PRB M2005 (Price Place)





11:30 am, Friday, Oct 9th at PRB M2005 (Price Place)

Special Seminar 1
Speaker: Basudeb Dasgupta ( Tata Institute of Fundamental Research )

Title: Neutrino Flavor Conversion at Very High Density
Abstract: 
We show that the flavor content of a dense gas of neutrinos is 
unstable to small oscillations in time. The tendency is to equilibrate 
the fluxes and and spectra of all flavors. We argue that this can 
happen at very high neutrino and matter densities, i.e., deeper 
in a supernova than previously realized, and may have profound 
consequences for core-collapse supernovae.

Special Seminar 2
Speaker: Rebecca Leane ( University of Melbourne )

Title: Dark Matter at the LHC
Abstract: 
In this talk I consider several issues faced by WIMP dark matter searches. 
Firstly, I discuss the popular use of effective field theories (EFTs) to quantify 
LHC bounds on dark matter, and show that some EFT operators considered 
do not respect the weak gauge symmetries of the standard model. These 
operators break down at the electroweak scale, rather than the energy scale 
of new physics, and are invalid at LHC energies. I consider the circumstances 
in which such operators can arise, use the mono-W process to illustrate 
potential issues in their interpretation and application, and discuss the 
phenomenology of a UV complete model that avoids such difficulties. In addition, 
as the WIMP parameter space is becoming increasingly constrained, I discuss 
the phenomenology of a simple leptophilic dark matter model, where the absence 
of tree-level dark matter couplings to quarks can relax the strong limits placed 
by hadron based experiments.

11:30 am, Friday, Oct 2nd at PRB M2005 (Price Place)


11:30 am, Friday, Sept 25th at PRB M2005 (Price Place)

Special Seminar
Time: 11:30- 12:00 
Speaker: Prof. Jure Zupan (University of Cincinnati)

Title: Some thoughts on Higgs portal to dark matter
Abstract: In the talk I will cover two aspects of Higgs portal dark  
matter: the effect of non-standard Higgs Yukawa couplings, and 
the searches for the mediators that need to be present in the 
case of fermionic dark matter.

Papers of interests this week:



11:30 am, Friday, Sept 18th at PRB M2005 (Price Place)


Special Seminar
Time: 11:30- 12:00 
Speaker: Joshua Yao-Yu Lin (National Taiwan University)

Title:  Impact of Gravitational Slingshot of Dark Matter on Galactic Halo Profiles
Abstract:
    We study the impact of gravitational slingshot effect from massive astrophysical 
objects (e.g. stars, black holes) on the distribution of cold dark matter in Milky Way 
sized galaxies and dwarf galaxies. Multiple gravitational encounters of a lower mass 
dark matter particle with massive astrophysical bodies would lead to an average 
energy gain for the dark matter, similar to second order Fermi acceleration. 
We calculate the average energy gain and model the integrated effect on the dark matter profile. 
We find that such slingshot effect due to the intermediate mass black holes in 
dwarf galaxies were significant in certain cases, which changes the dark matter distribution 
at the galactic center and several alleviate small scale problems of cold dark matter.

Papers of interests this week:



11:30 am, Friday, Sept 11th at PRB M2005 (Price Place)


Special Seminar
Time: 11:30- 12:00 
Speaker: Debtosh Chowdhury (INFN)

Title:  Dark Matter Annihilation to Fermions and a Photon
Abstract:
    We know from recent analyses that the inclusion of electroweak corrections can alter significantly
the energy spectra of Standard Model particles originated from dark matter annihilations. We are
interested in the process where radiation of photon has a significant contribution, in particular, 
where Majorana dark matter particle annihilate into a pair of light fermion. This process is helicity suppressed. 
The inclusion of photon radiation removes the p-wave suppression. We study this effect in detail using 
effective operators responsible for this process. We put bound on the effective operators considered from 
indirect dark matter searches and compare them with the bounds obtained from the direct and collider searches.

Papers of interests this week:







Summer 2015



11:30 am, Friday, Aug 28th at PRB M2005 (Price Place)






11:30 am, Friday, Aug 7th at PRB M2005 (Price Place)
  1. Boosting the Annihilation Boost: Semi-Analytic Model of Tidal Effects on Dark Matter Subhalos
  2. Missing energy and the measurement of the CP-violating phase in neutrino oscillations
  3. Comparison of the calorimetric and kinematic methods of neutrino energy reconstruction in disappearance experiments
  4. Performance of two Askaryan Radio Array stations and first results in the search for ultra-high energy neutrinos
  5. Neutrino detection at a spallation source
  6. Enhanced lines and box-shaped features in the gamma-ray spectrum from annihilating dark matter in the NMSSM
  7. Inflatable Dark Matter
  8. Coincidence charged-current neutrino-induced deuteron disintegration
  9. Cosmological Axion and neutrino mass constraints from Planck 2015 temperature and polarization data
  10. A measurement of the diffuse astrophysical muon neutrino flux using multiple years of IceCube data






11:30 am, Friday, July 10th at PRB M2005 (Price Place)

Special talk by Carsten Rott (Sungkyunkwan University, Korea)

Search for Dark Matter in the Sun
 
Abstract:
Dark Matter could be detected indirectly through the observation of neutrinos produced in self-annihilations or decays. Searches for such neutrino signals have resulted in the most stringent constraints on the lifetime of superheavy dark matter and world bests limits on spin-dependent scattering with matter. In recent years these searches have made significant progress in sensitivity through new search methodologies, new detection channels, and through the availability of rich datasets, foremost from the IceCube Neutrino Telescope. In this talk I will focus on the detection prospects for dark matter captured in the Sun by current and next-generation neutrino detectors.






11:30 am, Friday, June 19th at PRB M2005 (Price Place)
  1. Identifying the Theory of Dark Matter with Direct Detection
  2. Impact of the Geo-synchronous Orbit Radiation Environment on the Design of Astronomical Observatories
  3. Evidence for Unresolved Gamma-Ray Point Sources in the Inner Galaxy
  4. Strong support for the millisecond pulsar origin of the Galactic center GeV excess
  5. The Galactic Center GeV Excess from a Series of Leptonic Cosmic-Ray Outbursts
  6. Energy and Flux Measurements of Ultra-High Energy Cosmic Rays Observed During the First ANITA Flight
  7. Spectroscopy of geo-neutrinos from 2056 days of Borexino data
  8. Indirect Dark Matter Signatures in the Cosmic Dark Ages I. Generalizing the Bound on s-wave Dark Matter Annihilation from Planck
  9. Indirect Dark Matter Signatures in the Cosmic Dark Ages II. Ionization, Heating and Photon Production from Arbitrary Energy Injections
  10. Modelling the flux distribution function of the extragalactic gamma-ray background from dark matter annihilation
  11. Constraints on dark matter interactions with standard model particles from CMB spectral distortions
  12. A black hole window into p-wave dark matter annihilation




11:30 am, Friday, May 29th at PRB M2015 (the Seminar Room)

Special talk (1) by Yoshiyuki Inoue (ISAS/JAXA)

Probing the nature of AGN coronae through future X-ray and sub-mm observations
 
Abstract:
While the cosmic X-ray background is likely to originate from individual AGNs, the origin of the cosmic MeV gamma-ray background is not fully understood. We proposed that AGNs having non-thermal electrons in coronae may explain the MeV background. Such non-thermal electrons are expected to exist if a corona is heated by magnetic reconnections. However, the sensitivity of current MeV gamma-ray instrument is not sufficiently good to detect the expected power-law tail in the MeV band from individual AGNs. Furthermore, the heating mechanism of coronae in AGNs is still unknown, although magnetic reconnection heating is one possibility.  In this talk, I would like to introduce how we can probe the origin of the MeV background and the nature of AGN coronae such as magnetic field and non-thermal content through future observations by ASTRO-H and ALMA. 


Special talk (2) by Irene Tamborra (GRAPPA)

High energy neutrinos from extra-galactic astrophysical sources
 
Abstract:
The IceCube neutrino telescope recently discovered a flux of astrophysical neutrinos with energies up to few PeV.  In light of the new born high-energy neutrino astronomy era, I will discuss the expected high-energy neutrino emission from extra-galactic astrophysical sources as well as our chances to unveil the physics of the cosmic accelerators by employing neutrinos and their photon counterparts. 







11:30 am, Friday, May 22th at PRB M2005 (Price Place)

Special talk (1) by Scott Adams (OSU)

Not with a Bang, but a Whimper: Evidence for Low-energy Supernovae
 
Abstract:
I will present new HST and Spitzer late-time imaging of SN 2008S and NGC 300-OT,
the prototypes of a class of stellar transients whose true nature is debated. Both
objects have faded below the luminosity of their progenitors and are now undetected
in both the near and mid-IR, providing strong evidence that these events were
terminal. This, combined with the mass constraints on the progenitors, indicates that
this class of transients likely arise from electron-capture supernovae.


Special talk (2) by Kimberly Boddy (University of Hawaii)

Indirect Detection of Dark Matter Using MeV-Range Gamma-Ray Telescopes
 
Abstract:
The astrophysics community is considering plans for a variety of gamma-ray telescopes in the energy range 1--100 MeV, which can fill in the so-called "MeV gap" in current sensitivity. We investigate the utility of such detectors for the study of low-mass dark matter annihilation or decay. For annihilating (decaying) dark matter with a mass below about 140 MeV (280 MeV) and couplings to first generation quarks, the final states will be dominated by photons or neutral pions, producing striking signals in gamma-ray telescopes. We determine the sensitivity of future detectors to the kinematically allowed final states. In particular, we find that planned detectors can improve on current sensitivity to this class of models by up to a few orders of magnitude.








11:30 am, Friday, May 15th at PRB M2005 (Price Place)

Special talk by Ilias Cholis (Fermilab)

The Fermi Galactic Center excess
 
Abstract:
 The possible gamma-ray excess in the inner Galaxy and the Galactic center suggested by Fermi-LAT observations has triggered great interest in the astro-particle physics community. Among its various interpretations have been WIMP dark matter annihilations, gamma-ray emission from a population of millisecond pulsars, or emission from cosmic rays injected in a sequence of burst-like events or continuously at the GC. Given that the galactic diffuse emission is the dominant (by an order of magnitude or more) at any direction greater than 2 degrees from the GC understanding the background systematics has been a vital missing piece in the discussion. I will present the first comprehensive study of model systematics coming from the Galactic diffuse emission in the inner part of our Galaxy and their impact on the inferred properties of the excess emission at Galactic latitudes between 2 and 20 degrees and energies 300 MeV to 500 GeV. I will show both theoretical and empirical model systematics, which are deduced from a large range of Galactic diffuse emission models and a principal component analysis of residuals in numerous test regions along the Galactic plane. The hypothesis of an extended spherical excess emission with a uniform energy spectrum is compatible with the Fermi-LAT data in the region of interest at 95% CL.  Assuming that this excess is the extended counterpart of the one seen in the inner few degrees of the Galaxy, a lower limit of 10 degrees (95% CL) can be derived on its extension away from the GC.  In light of the large correlated uncertainties that affect the subtraction of the Galactic diffuse emission in the relevant regions, the energy spectrum of the excess is equally compatible with both a simple broken power-law of break energy 2.1 $\pm$ 0.2 and with spectra predicted by the self-annihilation of dark matter, implying in the case of $\bar{b}b$ final states a dark matter mass of 49$^{+6.4}_{-5.4}$ GeV. 
I will also briefly discuss interpretations of this excess, based on annihilating DM, leptonic CR outburst and a population of millisecond pulsars.




Spring 2015


11:30 am, Friday, May 1st at PRB M2005 (Price Place)
Special talk by Walter Winter (DESY Zeuthen, Germany)

Interpretation of IceCube results in the multi-messenger context
 
The discovery of high-energetic cosmic neutrinos is one of the recent
major breakthroughs in science. We discuss the concept of the neutrino
production, and interpret recent results taking into account the
information from other messengers (gamma-rays, cosmic rays). For
example, one question is if these neutrinos come from the most powerful
accelerators in the universe, i.e., the ones which can accelerate cosmic
rays to the highest observed energies. We also discuss future
perspectives for neutrino astronomy.


11:30 am, Friday, April 24th at PRB M2005 (Price Place)
Special talk(~30 mins) by Laura Lopez (CfA, Harvard)

Observational Tests of Cosmic-ray Diffusion in the Magellanic Clouds
 
Cosmic rays (CRs) play an important role in the interstellar medium: they ionize
dense molecular gas, they are responsible for the light elements in the periodic 
table, and they account for 20% of the ISM energy budget. However, the means
by which CRs are first accelerated and then transported through external
galaxies are not well understood. I will present results from a recent study of the
Magellanic Clouds to constrain CR transport using Fermi gamma-ray 
observations. I will show how we have characterized the spatial distribution of
gamma rays in the LMC and SMC and used the findings, in conjunction with 
available multiwavelength data, to constrain CR transport based on how the 
emission depends on physical parameters, such as gas density, massive star
formation, magnetic field structure, and turbulence properties.



AstroParticle lunch paper list:


12:30 pm, Friday, April 17th at PRB M2005 (Price Place)

  1. Dark matter annihilation and decay profiles for the Reticulum II dwarf spheroidal galaxy
  2. Stellar Kinematics and Metallicities in the Ultra-Faint Dwarf Galaxy Reticulum II
  3. Young Pulsars and the Galactic Center GeV Gamma-ray Excess
  4. Measurement of the Atmospheric νe Spectrum with IceCube
  5. A Combined Limit on the Neutrino Mass from Neutrinoless Double-Beta Decay and Constraints on Sterile Majorana Neutrinos
  6. Halo-Independent Direct Detection Analyses Without Mass Assumptions
  7. The behaviour of dark matter associated with 4 bright cluster galaxies in the 10kpc core of Abell 3827
  8. Improved Limits on Sterile Neutrino Dark Matter using Full-Sky Fermi-GBM Data
  9. AMS-02 antiprotons, at last! Secondary astrophysical component and immediate implications for Dark Matter
  10. On Detecting Millisecond Pulsars at the Galactic Center
  11. What could we learn from a sharply falling positron fraction?
  12. Comment on AMS02 results support the secondary origin of cosmic ray positrons

New AMS results this week!


12:30 pm, Friday, April 10th at PRB M2005 (Price Place)

Special talk!

Sam Stafford (OSU)
Analysis Interferometry of the Antarctic Impulse Transient Antenna (ANITA)

    Ultra-high energy (UHE) neutrinos may facilitate observation of sources in the
remotest parts of the universe.  A flux of UHE (E > 10^18eV) neutrinos is expected
from interaction of UHE cosmic rays with the cosmic microwave background.  
The Antarctic Impulse Transient Antenna (ANITA) campaign is a NASA Long-duration
balloon mission searching for coherent radio emission induced by ultra-high energy
neutrinos interacting in the Antarctic ice, as well as by UHE cosmic ray particle
cascades in the air.  The third ANITA flight began in December 2014 and lasted 
for 22 days.  I give a general description of the ANITA-III payload and flight, and 
present analysis methods to be used in identifying and localizing radio pulse events.








12:30 pm, Friday, March 13th at PRB M2005 (Price Place)

Dwarf papers!
  1. Beasts of the Southern Wild. Discovery of a large number of Ultra Faint satellites in the vicinity of the Magellanic Clouds
  2. Evidence for Gamma-ray Emission from the Newly Discovered Dwarf Galaxy Reticulum 2
  3. Eight New Milky Way Companions Discovered in First-Year Dark Energy Survey Data
  4. Search for Gamma-Ray Emission from DES Dwarf Spheroidal Galaxy Candidates with Fermi-LAT Data
  5. Searching for Dark Matter Annihilation from Milky Way Dwarf Spheroidal Galaxies with Six Years of Fermi-LAT Data





12:30 pm, Friday, February 20th at PRB M2005 (Price Place)

12:30 pm, Friday, February 13th at PRB M2005 (Price Place)
  1. Evidence for dark matter in the inner Milky Way
  2. Flavor Ratio of Astrophysical Neutrinos above 35 TeV in IceCube
  3. Searching for Dark Matter Annihilation to Monoenergetic Neutrinos with Liquid Scintillation Detectors
  4. CMB Constraints On The Thermal WIMP Annihilation Cross Section
  5. Constraints on decaying dark matter from the extragalactic gamma-ray background
  6. Constraints on an Annihilation Signal from a Core of Constant Dark Matter Density around the Milky Way Center with H.E.S.S
  7. A limit on the ultra-high-energy neutrino flux from lunar observations with the Parkes radio telescope
  8. Signals from dark atom formation in halos
  9. Spectral analysis of the high-energy IceCube neutrinos
  10. The Knee of the Cosmic Hydrogen and Helium Spectrum below 1 PeV Measured by ARGO-YBJ and a Cherenkov Telescope of LHAASO
  11. Effects of axions on Nucleosynthesis in massive stars
  12. Effect of first forbidden decays on the shape of neutrino spectra
  13. Which is the flavor of cosmic neutrinos seen by IceCube?




12:30 pm, Friday, January 16th at PRB M2005 (Price Place)