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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-2859
DTSTART:20121129T213000Z
DTEND:20121129T230000Z
DTSTAMP:20260412T094547Z
LAST-MODIFIED:20121113T195241Z
LOCATION:4421 Sterling Hall
SUMMARY:Revealing the origins and environments of Mg II absorbers with
  the SDSS and 3D-HST\, Astronomy Colloquium\, Britt Lundgren\, Astrono
 my Department
DESCRIPTION: Foreground absorption features in the spectra of distant 
 quasars provide largely unbiased probes of the baryon content of galax
 ies and the intergalactic medium to high redshift. Absorption features
  from singly-ionized magnesium (Mg II) are particularly prolific in op
 tical spectra within the range 0.3 < z < 2.0\, and are expected to tra
 ce a wide range of galaxy environments and halo-disk processes\, thoug
 h detecting the individual host galaxies of these absorbers presents a
 n observational challenge.  The extraction of ~100\,000 quasar absorpt
 ion line systems from the Sloan Digital Sky Survey -I/II and -III has 
 begun to revolutionize our understanding of the host galaxies and envi
 ronments of Mg II absorbers. I will present highlights from my work ex
 amining the statistical properties of Mg II host galaxies from stackin
 g and clustering measurements using the largest absorption line data s
 et ever compiled.  I will also present new direct observations of Mg I
 I host galaxies at z > 1 from the 3D-HST Survey.  These analyses revea
 l compelling links between high equivalent width Mg II absorbers and l
 arge-scale star formation-driven outflows\, which I will discuss in th
 e context of other recent findings from the literature.
URL:https://www.physics.wisc.edu/events/?id=2859
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