Program

(Schedule to be confirmed)

It will start Monday afternoon and end by Friday noon.

Anna Nierenberg

Title: 

Strong gravitational lensing tests of dark matter.

Abstract: 

I will give an overview of our current understanding of dark matter and several major classes of dark matter candidates that are being studied. I will explain how these dark matter candidates can be distinguished via small-scale structure tests. I will provide an introduction to gravitational lensing formalism and demonstrate how strong gravitational lensing can be used as a tool to distinguish between different dark matter models. This series will include an overview of the current state of the field as well as hands on examples with widely used strong gravitational lensing software.

Otto Hannuksela

Title:

Lensing of gravitational waves

Abstract:

Gravitational waves, ripples in the fabric of spacetime, can be gravitationally lensed by intervening massive objects. A growing scientific consensus suggests that gravitational-wave lensing will be observed soon as the planned detector upgrades are implemented. In this lecture I introduce the basics of gravitational-wave lensing searches, parameter estimation, and forecasts, with a focus on practical applications.

Paz Beniamini

Title:

TBA

Abstract:

TBA

Ryuichiro Kitano

Title:

Physics beyond the Standard Model

Abstract:

The Universe tells us that we need beyond the Standard Model physics. I will try to summarize what we need and what to look for.

Akito Kusaka

Title:

TBA

Abstract:

TBA

Kotaro Kohno

Title:

From Cosmic Dawn to the Cosmic Web : Galaxy Evolution in the Radio, Millimeter, and Submillimeter Universe

Abstract:

How did galaxies assemble their gas, metals, dust, and central black holes, and how did their environments influence this evolution? Radio, millimeter, and submillimeter observations provide unique access to cold gas, dust-obscured star formation, far-infrared cooling lines, relativistic jets, and the hot gas in forming galaxy clusters.

I will first discuss how ALMA and JWST together are transforming our view of galaxies in the first few hundred million years of cosmic history. Examples include the ALMA detection of [O III] 88 um emission from JADES-GS-z14-0 at z=14.18, as well as ongoing deep searches for dust emission from galaxies at z>10, which provide new constraints on the earliest production of cosmic dust and obscured star formation. I will also present ALMA constraints on HF absorption in a lensed dusty star-forming galaxy at z=6.02, using cosmic fluorine as a probe of nucleosynthesis and past star-formation activity.

I will then turn to galaxy evolution in dense environments, highlighting the protocluster SPT2349-56 at z=4.3, where the Sunyaev-Zel’dovich effect reveals a nascent intracluster medium with more thermal energy than expected from gravitational heating alone, possibly indicating early AGN pre-heating. The growth and impact of supermassive black holes will be explored through ALMA and JWST observations of distant quasars and VLA and LOFAR studies of radio galaxies and radio-loud quasars.

Finally, I will discuss prospects with SKA and submm-wave on-chip superconducting imaging-spectrograph. Line intensity mapping of [C II] 158 um and [O III] 88 um emission, particularly in cross-correlation with SKA 21-cm observations, offers a new way to connect galaxies, interstellar gas, and large-scale structure during cosmic reionization. I will also highlight future submillimeter searches for redshifted pure-rotational H2 emission, which may provide direct access to energetically important warm molecular gas and its cooling in the first galaxies and overdense regions at cosmic dawn.

Ryosuke Sugimoto

Title:

Development of Gravitational-Wave Detectors for Observations in the 0.1 Hz Band

Abstract:

Since the first detection of gravitational waves by Advanced LIGO in 2015, the global network of ground based gravitational wave detectors, including LIGO, Virgo, and KAGRA, has reported more than 200 events to date. These signals lie primarily in the approximately 10–1000 Hz frequency band and originate mainly from compact binary systems consisting of stellar mass black holes and neutron stars. These observations have provided unprecedented insights and helped establish gravitational wave astronomy.

Meanwhile, at lower frequencies—particularly around 0.1 Hz—we anticipate a wealth of new scientific opportunities, including early detection of binary inspirals, detection of intermediate mass black hole binaries, and ultimately observations of primordial gravitational waves. However, the sensitivity of current ground based detectors at low frequencies is limited mainly by terrestrial noise. To overcome this limitation, space based gravitational wave detectors are being planned, while there are also plans to achieve high sensitivity at low frequencies on the ground using approaches different from those of conventional detectors.

In this talk, I will introduce detector development efforts toward observations in the 0.1 Hz band from the perspectives of both space based and ground based detectors.