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PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-3856
DTSTART:20151119T213000Z
DTEND:20151119T230000Z
DTSTAMP:20260419T110944Z
LAST-MODIFIED:20151104T191910Z
LOCATION:4421 Sterling Hall\, Talk starts at 3:45 PM
SUMMARY:Ejective Feedback and the Gas Around Galaxies\, Astronomy Coll
 oquium\, Aleks Diamond-Stanic\, UW Astronomy Grainger postdoctoral Fel
 low
DESCRIPTION:Our understanding of galaxy evolution centers around quest
 ions of how gas gets into galaxies\, how it participates in star forma
 tion and black hole growth\, and how it is returned to its galactic su
 rroundings via feedback. On a global scale\, measurements of the baryo
 n density and the stellar mass function indicate that only 5% of baryo
 ns have formed stars by the present day\, and this suggests that feedb
 ack from massive stars and supermassive black holes must prevent gas f
 rom forming stars in both low-mass and high-mass dark matter halos.  I
  will present observational results on the geometry and kinematics of 
 outflowing and inflowing gas around galaxies\, including measurements 
 of ejective feedback that is capable of quenching star formation by re
 moving the cold gas supply.  These results have broader implications f
 or how gas is consumed and expelled at the centers of massive galaxies
  and for the limits of feedback from stellar radiation and<br>
\nsuper
 novae.  I will also discuss prospects for characterizing the physical 
 properties of gas in and around galaxies using multi-wavelength spectr
 oscopy with existing and future facilities.
URL:https://www.physics.wisc.edu/events/?id=3856
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