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UID:UW-Physics-Event-5393
DTSTART:20200227T213000Z
DTEND:20200227T230000Z
DTSTAMP:20260415T041028Z
LAST-MODIFIED:20200227T140259Z
LOCATION:4421 Sterling Hall\, Coffee and cookies 3:30 PM\, Talk begins
  3:45 PM
SUMMARY:The Life Cycle of galaxies in clusters over 10 Billion Years\,
  Astronomy Colloquium\, Greg Rudnick\, Director of Graduate Studies\, 
 University of Kansas\, Department of Physics and Astronomy
DESCRIPTION:Galaxies live in a range of environments\, characterized b
 y their volume density. For example\, the densest regions of the Unive
 rse are in galaxy clusters\, which contain hundreds to thousands of ga
 laxies all in pseudo gravitational virial equilibrium. These dense env
 ironments can in turn alter the properties of the galaxies themselves 
 in striking ways via a variety of gravitational and hydrodynamic proce
 sses. The result of these processes alter galaxy shapes\, their intern
 al dynamics\, and shuts off the formation of new stars. I will present
  work I have been doing to characterize the evolution of galaxies in c
 lusters over the past 10 billion years as a way of understanding how t
 he environment can affect galaxies. I will describe how we have used e
 xtensive multi-wavelength data sets on distant clusters to form a pict
 ure in which infalling cluster galaxies likely have their gas supplies
  cut off\, their morphologies transformed\, and may even experience ep
 ochs of very frequent mergers.  I will then describe new results from 
 a large program called Gemini Observations of Galaxies in Rich Environ
 ments (GOGREEN) which is the premier spectroscopic survey of distant c
 lusters.  With the GOGREEN data\, we are finding that the quenching of
  galaxies in dense environments at high redshift may proceed very diff
 erently from that at redshifts less than one\, requiring a revision of
  our thoughts on how environment affects galaxy evolution at large loo
 kback times.
URL:https://www.physics.wisc.edu/events/?id=5393
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