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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-1443
DTSTART:20090303T213000Z
DURATION:PT1H0M0S
DTSTAMP:20260506T190758Z
LAST-MODIFIED:20090206T150606Z
LOCATION:6515 Sterling Hall
SUMMARY:The Origins and Evoluation of Weak MB II Quasar Absorption Lin
 e Systems\, Astronomy Colloquium\, Anand Narayanan\, UW Astronomy Dept
DESCRIPTION:Among the various class of intervening quasar absorption l
 ine systems\, the origin(s) of weak Mg II absorbers have remained a my
 stery. It is not well understood what kind of astrophysical structures
  produce these absorption systems. I will present results from UV and 
 optical spectroscopic surveys of ~100 quasar sight lines\, which has y
 ielded a full census of this absorber population over a significant fr
 action of the history of the universe. Based on the results we extend 
 the proposition that a substantial fraction of these absorbers could b
 e tracing gas at the galaxy-IGM interface\, analogous to Galactic high
 -velocity cloud structures.<br><br>
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URL:https://www.physics.wisc.edu/events/?id=1443
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