<< April 2012 >>
Sun Mon Tue Wed Thu Fri Sat
 1   2   3   4   5   6   7 
 8   9   10   11   12   13   14 
 15   16   17   18   19   20   21 
 22   23   24   25   26   27   28 
 29   30   
Add an Event Edit This Event

This Week at Physics

<< Fall 2011 Spring 2012 Fall 2012 >>

Event Number 2659

  Thursday, April 19th, 2012

Astronomy Colloquium
Infrared-luminous galaxies: their Evolution, Clustering and Fates
Time: 3:30 pm
Place: 4421 Sterling Hall
Speaker: Benjamin Weiner, Steward Observatory
Abstract: Infrared-luminous galaxies are powered by star formation or active
galactic nuclei, but emit much of their light as radiation reprocessed by dust into the far infrared. The most massive starbursts in both the local and high redshift universe are ultraluminous infrared galaxies(L_IR > 1012 Lsun). This class of galaxies was discovered by IRAS and studied extensively with Spitzer. However, it remains controversial what IR-luminous galaxies at z=1 are, and what they will evolve into. Are IR-luminous galaxies at high redshift mostly galaxy mergers, as they are at low redshift? Are ultraluminous IR galaxies strongly clustered, and can we infer whether they must evolve into cluster galaxies today? Is star formation in high-z IR-luminous galaxies centrally concentrated or spatially extended? I will discuss these questions using data from Spitzer/MIPS, HST, and the DEEP2 redshift survey. I will also show near-infrared slitless spectroscopy from the WFC3 instrument on Hubble, and its use as a probe of star-forming galaxies at high redshifts, with some application to measuring extinction and the spatial extent of star formation in high-z galaxies.
Host: Christy Tremonti
Add this event to your calendar

©2013 Board of Regents of the University of Wisconsin System