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PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-1802
DTSTART:20100309T213000Z
DTEND:20100309T230000Z
DTSTAMP:20260415T021237Z
LAST-MODIFIED:20100303T135525Z
LOCATION:3425 Sterling Hall
SUMMARY:The Role of Gas Bearing Dwarfs in Near Field Cosmology\, Astro
 nomy Colloquium\, Dr. Sabrina Stierwalt\, CALTECH
DESCRIPTION:Dwarf galaxies constitute the most numerous extragalactic 
 population in the local universe and can thus place constraints galaxy
  formation. Gas-deficient dwarfs with little to no recent star formati
 on dominate the Local Group but a few faint\, HI-bearing dwarfs like L
 eo T have been discovered in the outskirts of the Milky Way's influenc
 e. ALFALFA\, an ongoing blind HI survey\, has found a significant popu
 lation of low surface brightness dwarfs missed by previous optical sur
 veys suggesting that these systems may represent a so far poorly studi
 ed population of widely distributed\, optically faint yet gas-bearing 
 dwarf. In this talk I will present our current understanding of the co
 ntribution of gas-bearin dwarfs to cosmology at z=0. Can they solve th
 e substructure problem? How significant is the role of environment in 
 their formation? What fraction of dwarfs have been formed from tidal d
 ebris?<br><br>
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URL:https://www.physics.wisc.edu/events/?id=1802
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