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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:20240328T193048Z
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?
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URL:https://www.physics.wisc.edu/events/?id=1802
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