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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20090422T000000
DTEND;TZID=Atlantic/Canary:20090422T010000
UID:iactalks-59
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/59
CREATED:2009-04-22T00:00:00+01:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:Unbiased studies of galactic outflows
DESCRIPTION:Unbiased studies of galactic outflows\nDr. Daniel Nestor\n\nLar
 ge-scale outflows from galaxies are a crucially important yet poorly under
 stood aspect of galaxy evolution.  They redistribute gas and metals into t
 he IGM, regulate star formation, affect the galaxy luminosity function and
  mass-metallicity relation, etc. Unfortunately, their detailed context in 
 galaxy evolution is difficult to understand: locally, they are identified 
 and studied in heterogeneous manners, while we have only recently begun to
  study them on cosmological scales and then only in known bright, starburs
 ting galaxies.\n\nI will discuss increasing evidence that the so-called ul
 tra-strong MgII intervening quasar absorbers select galactic superwinds ov
 er a large range of redshift in a manner independent of luminosity.  As su
 perwinds cover a small fraction of the sky at any epoch, only with recent 
 huge quasar absorption lines surveys has it been possible to identify sign
 ificant numbers of outflows in this manner.  I will present new results fr
 om several of our studies -- including the measurement of the average SFR 
 of their hosts using [O II] emission from SDSS composite spectra, WIYN, Ge
 mini and WHT imaging of the superwind environments, Gemini/GMOS spectrosco
 py of superwind host galaxies, and VLT/UVES echellegrams of the absorption
  lines -- with the aim of understanding the nature of the outflows, their 
 host galaxies, environments, and their evolution over cosmic time.\n\n
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