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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-3713
DTSTART:20150507T203500Z
DTEND:20150507T220000Z
DTSTAMP:20260419T124515Z
LAST-MODIFIED:20150422T144750Z
LOCATION:4421 Sterling Hall
SUMMARY:Searching for evidence for ongoing cold accretion in the local
  universe using the Green Bank Telescope\, Astronomy Colloquium\, DJ P
 isano\, West Virginia University Physics & Astronomy
DESCRIPTION:One of the key questions in astronomy today is how galaxie
 s accrete the gas they need to fuel ongoing star formation. While many
  interferometric surveys have revealed populations of low mass HI clou
 ds around galaxies\, they have not found enough gas to sustain continu
 ed star formation.  One possible explanation of this deficit is that t
 his HI is extended and diffuse such that it is missed by interferomete
 rs.  To rectify this problem\, my collaborators and I are conducting a
  Green Bank Telescope (GBT) HI survey of about 50 local galaxies. The 
 GBT's unique design makes it the ideal single-dish telescope for obser
 ving low column density HI and makes it capable of detecting HI emissi
 on from analogs to Lyman limit systems.  I will present the initial re
 sults from our search for ongoing accretion from the ``cosmic web&quot
 \;\, how it compares with theoretical predictions\, and our future pla
 ns.
URL:https://www.physics.wisc.edu/events/?id=3713
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