Date

Speaker

Title

Aug 27

No talk scheduled.

Sept 3

Steve Finkelstein

University of Texas at Austin

Organizational Meeting.

Sept 10

Rebecca Larson

University of Texas at Austin

"Using Herschel Far-Infrared Photometry to Constrain Star Formation Rates in CLASH Cluster Galaxies"

Sept 17

Sabrina Cales

Yale University

(host: Shardha Jogee) Title: TBA.

Sept 24

Xingxing Huang

Johns Hopkins University

"Extreme Strong Emission Line Galaxies at z ~ 1-2 and the Implications for High Redshift Galaxies" (host: Steve Finkelstein.)

abstract

Oct 1

Keely Finkelstein

University of Texas at Austin

"Probing the Physical Properties of High-Redshift Lyman-Alpha Emitters with Spitzer"

Studies of Lyman Alpha emitting galaxies (LAEs) offer insight into an understanding of early galaxies and the build-up of galaxies at early times. To better understand these objects and constrain their stellar properties, we have observed a sample of 162 z=4.5 and 14 z=5.7 LAEs with deep Spitzer IRAC 3.6 and 4.5 micron imaging from the Spitzer Lyman Alpha Survey. This is by far the largest sample of high-redshift LAEs imaged with Spitzer, which probes rest-frame optical wavelengths at these redshifts, improving constraints on the stellar masses and star-formation rates. By fitting the spectral energy distributions of individual LAEs using ground-based optical, HST near-IR, and Spitzer mid-IR imaging, we show that our sample of LAEs has a wide range of stellar properties. For individual LAEs detected with IRAC, stellar mass ranges from 5x10^8 - 10^11 solar masses. In addition, we find a correlation between stellar mass and star formation rate (SFR), similar to trends measured at lower redshift. However for this sample of higher redshift LAEs, the LAE sequence is elevated compared to continuum-selected galaxies at the same redshift, meaning that for a given stellar mass, the LAEs tend to have higher star formation rates. However, a subset of massive LAEs sits on the continuum-selected galaxy trend, tentatively implying that there may be two mechanisms for Lyman alpha escape.

close

Oct 8

Speaker: TBD

Affiliation: TBD

No talk scheduled.

Oct 15

Greg Zeimann

University of Texas at Austin

"Why Dust Attenuation at High Redshift in Truly a NUISANCE Parameter."

abstract

Oct 22

Jimmy

UT Austin: Physics Dept.

"The Fundamental Metallicity Relation with Dwarf Irregular Galaxies"

abstract

Oct 29

(1) Matt Stevans
(2) Akim Yildirim

(1)University of Texas at Austin
(2)University of Heidelberg, Germany

(1) "The Hobby Eberly Telescope Dark Energy Experiment (HETDEX) and Galaxy Evolution"

(2) "Compact Elliptical Galaxies in the Local Universe"

Nov 5

Bev Wills

University of Texas at Austin

"Magnetic Field Alignment in Relativistic Jets of Active Galactic Nuclei"

Nov 12

John Kormendy

University of Texas at Austin

"Fritz Zwicky: Personal Recollections"

Nov 19

Andrew Leung

University of Texas at Austin

"Bayesian Redshift Classification of Emission-line Galaxies in HETDEX"

Nov 26

Thanksgiving Day Holiday. UT Closed. No talk scheduled.

Dec 3

Nancy Kawinwanichakij

Texas A&M University

"What do Satellite Galaxies tell us about their Dark Matter Halos and Galaxy Quenching?"

abstract