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Jan 21
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Steven Finkelstein
University of Texas at Austin
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Organizational Meeting.
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Jan 28 |
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No talk scheduled.
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Feb 4 |
Steven Finkelstein
University of Texas at Austin |
"Review Article: Observational Searches for Galaxies at z > 6"
abstract
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Feb 11 |
Sarah Wellons
Harvard Center for Astrophysics (host: Michael Boylan-Kolchin) |
"Identifying the Progenitors and Descendants of Compact Elliptical Galaxies with Cosmological Simulations"
abstract
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Feb 18 |
Rachel Livermore
University of Texas at Austin |
"Directly Observing Dwarf Galaxy Progenitors at z > 6 (or: Gravitational Lensing is Magic)"
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Feb 25 |
Kristen McQuinn
University of Texas at Austin |
"Galaxy Evolution at the Faint-end of the Luminosity Function"
abstract
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Mar 03 |
Intae Jung
University of Texas at Austin |
"Evidence for the Supression of Star-Formation in the Centers of Massive Galaxies at z = 4"
We perform the first spatially-resolved stellar population study of galaxies over the GOODS-S field in the early universe (z = 3.5-6.5), utilizing the Hubble Space Telescope Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS) imaging dataset. We select a sample of 453 bright and extended galaxies at z = 3.5-6.5, from a parent sample of ~8000 photometric-redshift selected galaxies at z = 3.5-8.5 (Finkelstein et al. 2015). We separate each galaxy into several concentric rings with various radial distances to the galactic center, and perform aperture photometry to calculate the fluxes from each annulus. We derive the radial dependence of the galaxy properties such as stellar mass, star formation rate, and dust content via spectral energy distribution fitting based on a Markov Chain Monte Carlo algorithm. We find that in our highest two redshift bins (z ~ 5 and 6), our sample of galaxies shows specific star formation rates (sSFRs) which are generally independent of the radial distance from the center of the galaxies, indicating that stars are formed uniformly at all radii, contrary to massive galaxies at z <= 2. However, in our lowest redshift bin of z ~ 4, the majority of galaxies with the highest central mass densities (log M/Msun > 9 kpc^-2) show evidence for a preferentially lower sSFR in their centers than in their outer regions, indicative of the suppression of star formation in their central regions, possibly leading to the formation of bulges.
close
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Mar 10 |
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No talk scheduled.
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Mar 17 |
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No talk scheduled: Spring Break.
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Mar 24 |
Chao-Ling Hung
University of Texas at Austin |
"Connecting Dusty Starburst Galaxies and Proto Galaxy Clusters - A Case Study at z = 2.1"
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Mar 31 |
Jonathan Florez
University of Texas at Austin |
"Measuring the Properties of Void Galaxies in the ECO Survey using RESOLVE"
abstract
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Apr 7 |
Caitlin Casey
University of Texas at Austin |
Title: TBA
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Apr 14 |
Neal Evans
University of Texas at Austin |
Title: TBA
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Apr 21 |
Sinclaire Manning
University of Texas at Austin |
Title: TBA
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Sydney Sherman
University of Texas at Austin |
Title: TBA
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Apr 28 |
Enrique Lopez-Rodriguez
University of Texas at Austin |
"Dusty Winds in Active Galactic Nuclei: An Infrared Polarimetric Approach"
abstract
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Lindsay Fuller
University of Texas, San Antonio |
"Investigating the Dusty Torus of Active Galactic Nuclei Using SOFIA/FORCAST Photometry"
abstract
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May 5 |
Rebecca Tippens (2nd Year Defense)
University of Texas at Austin |
Title: TBA
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