Colloquia Schedule Fall 2012

Colloquia are on Tuesdays (unless otherwise indicated) at 3:30 pm in RLM 15.216B

Sep. 4

"Finding and Characterizing the Sources of the Ionizing Background with Keck and HST"


Brian Siana

University of California, Riverside

host: Steve Finkelstein

Sep. 11

1. "Investigating the Early Universe with Lyman-alpha Emission: Galactic Winds and Stellar Populations at z ~ 3.1"
2. "Two Can't Play That Game: The Perils of Planet Formation in Binary Environments"
3. "Magnetic Fields in the Milky Way"


1. Emily McLinden, 2. Stefano Meschiari, and 3. Michael Pavel

University of Texas at Austin

host: Sarah Tuttle

Sep. 18

"Star Formation, Near and Far (y un anyo en Ame'rica del Sur)"


Neal Evans

University of Texas at Austin

host: Steve Finkelstein

Sep. 25

"Measuring Galaxy Evolution from Modern Near-IR Surveys"


Casey Papovich

Texas A&M University

host: Steve Finkelstein

Oct. 2

"Carbon Stars and Dust Production in the Local Group"


Gregory C. Sloan

Cornell University

host: Harriet Dinerstein

Oct. 9

"Peering Through the EoR Window with the Murchison Widefield Array"


Miguel F. Morales

University of Washington

host: Neal Evans

Oct. 16

"HETDEX Status"


Karl Gebhardt & Gary Hill

University of Texas at Austin

host: Steve Finkelstein

Oct. 23

"Stellar Feedback and the Ecology of the Galactic ISM"


John Bally

University of Colorado, Boulder

host: Keely Finkelstein

Oct. 30

"Obesity in the Universe: Why Did Early-Type Galaxies Grow in Size?"


Richard Ellis

California Institute of Technology

host: Paul Shapiro

Nov. 6

"The Gaseos Environment of Distant Galaxies"

The evolution of high-redshift galaxies is regulated by the balance between the inflow of fresh fuel that is required to form new stars and the outflow of metal-polluted material that is ejected from star forming regions. The circumgalactic medium, being at the interface between galaxy disks and the intergalactic medium, has been recognized as one of the most fundamental components in the life of a galaxy. In this talk, I will review our current understanding of the gaseous environment of distant galaxies. I will focus on the recent theoretical picture according to which galaxies at high redshifts are fed by extended streams of cold gas in a smooth component and in merging satellites. I will compare and contrast the findings of numerical simulations with observations of high-redshift Lyman break galaxies and I will discuss the prospects of mapping the circumgalactic medium with absorption line systems, presenting results from recent and ongoing observations.


Michele Fumagalli

University of California, Santa Cruz

host: Chris Sneden

Nov. 13

"Cassini-Huygens explores the Saturn System: Recent Discoveries and Science Highlights"


Linda Spilker

Jet Propulsion Laboratory

host: Bill Cochran

Nov. 20

"Exploring Galactic Chemical and Dynamical Evolution: Pre and Post SDSS-III/APOGEE"


Peter Frinchaboy

Texas Christian University

host: Chris Sneden

Nov. 27

"Understanding Galaxy Clusters, the Most Massive Objects in the Universe"


Lindsay King

University of Texas, Dallas

host: Karl Gebhardt

Dec. 4

"Galaxy Formation: Physics and Numerics"


Dusan Keres

University of California, San Diego

host: Karl Gebhardt

Dec. 10

"Ultrahigh Energy Cosmic Rays, Pulsars, and Supernovae"


Kumiko Kotera

Institut d'Astrophysique de Paris

host: Milos Milosavljevic

Visitors to the Department of Astronomy can find detailed information and maps on our Visiting Austin Page.

Please report omissions/corrections to: G. Orris at


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