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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-3330
DTSTART:20140403T203000Z
DTEND:20140403T220000Z
DTSTAMP:20260416T144445Z
LAST-MODIFIED:20140317T162028Z
LOCATION:4421 Sterling Hall
SUMMARY:The Gaseous Environments of Galaxies: Toward Lower Halo Masses
  and Absorption Morphology\, Astronomy Colloquium\, Kate Rubin\, Harva
 rd-Smithsonian Center for Astrophysics
DESCRIPTION:The environments extending several hundred kiloparsecs fro
 m galaxies contain the fuel that feeds galactic star formation\, and a
 ct as the reservoir into which ejecta from stellar and AGN feedback ar
 e driven. Observations of the cool hydrogen and metal content of these
  regions (i.e.\, the circumgalactic medium\, or CGM) can therefore pro
 vide incisive tests of our understanding of these processes.  I will b
 riefly discuss current constraints on the content of the CGM around ma
 ssive\, &amp\;gt\; L* galaxies from z~2 to ~0.  I will then describe a
  new technique that pinpoints much fainter\, sub-luminous systems at z
 ~2\, allowing us to probe the gas in their surroundings in absorption 
 toward background QSOs for the first time.  I will also discuss prospe
 cts for new constraints on the sizes of CGM absorbers\, and provide a 
 first glimpse into the small-scale distribution of this diffuse materi
 al.  Such measurements represent important steps toward a complete\, d
 etailed empirical picture of the CGM.<br>
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URL:https://www.physics.wisc.edu/events/?id=3330
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