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Poster presentation for "Uncovering early galaxy evolution in the ALMA and JWST era IAU Symposium 352 • June 3 – 7, 2019 • Viana do Castelo, Portugal"

posted Jun 3, 2019, 7:43 AM by Carl Ferkinhoff

"Characterizing the ISM of High-z Galaxies with ALMA, the JVLA and JWST " (pdf)

Galaxies and their ISM have evolved significantly from the early Universe until today. Gas densities, metallicities, and the radiation fields permeating the ISM, have all changed. Understanding these changes and the factors driving the changes is vital to knowing how our own galaxy came to be. Both ALMA and JWST can provide important and complementary constraints on the ISM in high-z galaxies, giving us a glimpse into the changes occuring from early epochs to the present day. In this talk I will discuss methods to probe ISM conditions of high-z galaxies by combining far-IR Fine structure line observations, as observed with ALMA, with JVLA radio continuum observations. To demonstrate the potential of the method I will share initial results of the ZINGRS (The ZEUS 1 & 2 INvestigated Galaxy Reference Sample) Radio Survey. Lastly, I will detail the complementary observations in the rest frame optical and near-IR accessible with JWST that, when combined with far-IR & radio method, will provide a detailed picture of the ISM across cosmic time.

OST Face-to-Face #6

posted Sep 15, 2017, 5:42 AM by Carl Ferkinhoff   [ updated Sep 15, 2017, 6:15 AM ]

I gave a talk on the Rise of Metals science case the 6th OST Face-to-face meeting at the Space Telescope Science Institute, Baltimore, MD on September 14-15, 2017. You can view the talk here: https://docs.google.com/presentation/d/1zEgLkC7HS1RSRn0LKua7n38PF4XeFxwRuBPIAfm6FBk/edit?usp=sharing 

I also put some slides together to think about the minimum size of OST Concept 2:  https://docs.google.com/presentation/d/13Nnd0J2S9xqmQMKQNz02XtW38RcQZsv90gjGYLvA5Is/edit?usp=sharing 

It depends a lot on how much science we want to do. If we assume same science outcomes as for OST-9m, but we focus on fewer science cases, then the minimum is 6m, if we assume the instruments do not loose any beams on sky.

Minnesota Institute for Astrophysics Colloquium

posted Apr 14, 2017, 3:09 PM by Carl Ferkinhoff

Friday, April 14th I had a great visit to the University of Minnesota and the Minnesota Institute for Astrophysics. I gave a talk at the colloquium titled: 

Abstract: This year marks the 42nd anniversary of the first far-infrared fine-structure line detection, the [OIII] 88 micron line, by the NASA Learjet in 1975. Additional pioneering work through the early 90’s revealed the astrophysical importance of the full suite of far-IR lines and demonstrated their power as probes of the physics conditions in the interstellar medium (ISM). While inaccessible from ground at their rest wavelengths, they begin falling into the short submillimeter telluric-windows (~200 to 500 μm) from high-z systems at z~1. Over the past one and half decades ISO, Herschel and now SOFIA have provided detailed studies of the lines in the local universe while ground based observations made the first detections of the lines from the early universe. These first detections in the high-z universe demonstrated the lines’ utility for studying high redshift systems. This includes the ability to constrain the size of star-forming regions, quantity of ionized gas, age of the starburst, and gas phase abundances to name a few. Now in the ALMA era, studies using the fine-structure lines have the potential to dramatically increase our understanding of early galaxies, both in their formation and evolution. Much work is required, however, to fully realize this potential. In this talk I will seek to answer two questions in regards to the far-IR fine-structure lines: Where are we and where do we need to go? In answering these questions, I will summarize the current state of fine-structure line studies—both locally and in the distant universe—while highlighting some of my recent work with ALMA and explaning the “[CII] deficit”. In the last part of the talk, I will discuss future multi-wavelength studies, including that ZINGRS Radio Survey, which will help realize the full scientific potential of the FIR fine-structure lines for studying the early universe.

Follow the link above for a PDF of the talk.

AAS 299

posted Jan 5, 2017, 6:38 AM by Carl Ferkinhoff   [ updated Jan 11, 2017, 2:54 PM ]

Here is my talk from the 229th AAS in Grapevine, Texas. Includes very preliminary results (reduction led by Sarah Higdon - Georgia Southern) from the ZINGRS Radio Survey 

Data Cubes for ALMA paper (Ferkinhoff et al. 2015)

posted Jun 24, 2015, 2:40 AM by Carl Ferkinhoff

The calibrated and reduced data cubes for the recently published paper are available here: 
Ferkinhoff, Carl, 2015, "Band-9 ALMA Cycle-0 Observations of SMMJ02399 and the Cloverleaf",http://dx.doi.org/10.7910/DVN/GTUKO8, Harvard Dataverse, V1

Successful Workshop, Paper Published and Faculty Job Accepted!

posted Jun 24, 2015, 1:53 AM by Carl Ferkinhoff   [ updated Jun 24, 2015, 1:57 AM ]

It has been an exciting past couple of months. First, my paper on ALMA cycle 0 observations of two high-z galaxies has officially appeared in the Astrophysical Journal! Second, on June 8-11 was the Far-Infrared Fine Structure Line Workshop here in Heidelberg. The workshop of ~40-50 people was organized by myself, Roberto Decarli, Laura Zschaechner and Maria Kapala. It was a great success! We are working on getting talk PDFs and the "Unproceeding" of the workshop on the web. Lastly, I have accepted a tenure-track faculty job! In January 2016 I will be starting as an Assistant Professor of Physics at Winona State University in Winona, Minnesota. While sad to leave the great folks in Germany, I am excited to be joining the faculty and students in Winona as well as being back in Minnesota!

FIR Fine-Structure Line Workshop Participants Fine-Structure Line Workshop participants!!!

I'm a gunna be a Prof!

ALMA Paper is Published!!!

AAS 225 in Seatle Washington

posted Jan 6, 2015, 11:35 PM by Carl Ferkinhoff   [ updated Jan 6, 2015, 11:36 PM ]

I had a poster presentation on Monday of the AAS conference. The poster discussed a simple analytic model for understanding the [CII] deficit. The work discussed in the paper will be submitted to ApJ soon. In the mean time feel free to download a PDF of the poster by clicking on the image below!

AAS Poster

ZEUS-2 Sensitivities

posted Aug 4, 2014, 8:56 PM by Carl Ferkinhoff

After several discussions and requests for details on the ZEUS-2 sensitivities, I realized that they are not posted online anywhere in an easily digestible format. So here they are. A PDF is also available 

These values are also found in our series of SPIE proceedings Ferkinhoff et al. 2010 and Ferkinhoff et al. 2012. A detailed description of the instrument mechanical, cryogenic and optical design is in Parshley et al. 2012. An instrument paper (Ferkinhoff et al. ) is in prep that will summarize all of the content of the SPIE proceedings and follow up on the first science paper Ferkinhoff et al. 2014.

I moved to Germany!

posted Feb 12, 2014, 9:29 AM by Carl Ferkinhoff

As of January 16th I am now in Heidelberg Germany! The move has been good and progress is being made on reducing and analyzing my ALMA Cycle 0 data! I even managed to find an apartment.

I've been doctored!

posted Dec 16, 2013, 2:24 PM by Carl Ferkinhoff   [ updated Dec 16, 2013, 2:27 PM ]

 I successfully defended by dissertation in Astronomy on December 2nd, or as we say at Cornell "I passed my B-exam!"  There are a few corrections to make in my dissertation by January 10th, the degree conferral deadline and then it is off to start my European adventure on January 15th. I even managed to get a one-way ticket to Germany for $600!

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