BEGIN:VCALENDAR
VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-3279
DTSTART:20140919T203000Z
DTEND:20140919T213000Z
DTSTAMP:20260309T063143Z
LAST-MODIFIED:20140910T192039Z
LOCATION:2241 Chamberlin Hall (coffee at 4:30 pm)
SUMMARY:Shedding Light on Distant Galaxies with 200\,000 Quasars\, Phy
 sics Department Colloquium\, Britt Lundgren\, UW Astronomy
DESCRIPTION:Distant quasars backlight the Universe across most of cosm
 ic time and can be used to reveal the evolving content and distributio
 n of the cosmic web.  Absorption features in quasar spectra mark the l
 ocations of gas in the intergalactic medium and provide sensitive phys
 ical tracers of many of the gaseous processes understood to regulate t
 he evolution of galaxies.  However\, studying these distant absorbers 
 in the context of their luminous counterparts (i.e.\, stellar populati
 ons) has long presented an observational challenge\, which has hindere
 d the ability of quasar absorption data to usefully inform galaxy evol
 ution models.  <br>
\n<br>
\nThe ~200\,000 quasars observed to date by
  the Sloan Digital Sky Survey (SDSS) have recently catalyzed our under
 standing of the host galaxies and physical environments of the most pr
 olific absorption species detected in optical quasar spectra.  I will 
 present recent statistical measurements made possible by the vast quas
 ar absorption line samples from the SDSS\, and present new\, direct ob
 servations of absorber host galaxies at high redshift using the Hubble
  Space Telescope.  Together these studies reveal compelling links betw
 een metal-rich absorbers and large-scale star formation-driven outflow
 s\, providing new insights into the role of feedback in the evolution 
 of galaxies over the past 10 Billion years.   
URL:https://www.physics.wisc.edu/events/?id=3279
END:VEVENT
END:VCALENDAR