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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-5102
DTSTART:20190418T203000Z
DTEND:20190418T221500Z
DTSTAMP:20260417T075856Z
LAST-MODIFIED:20190415T131056Z
LOCATION:4421 Sterling Hall\, Coffee and cookies 3:30 PM\, Talk begins
  3:45 PM
SUMMARY:Diermier Colloquium Talk- Revealing the Atomic Hydrogen in the
  small Magellanic cloud with the Australian Square Kilmetre Array Path
 finder"\, Astronomy Colloquium\, Naomi McClure-Griffiths\, The Austral
 ian National University
DESCRIPTION:The evolution of galaxies is partially regulated by their 
 infall and outflow of gas.  Many simulations of galaxy formation and e
 volution have highlighted the importance of feedback in reproducing th
 e observable Universe.  Huge superbubbles and outflows\, formed from t
 he stellar winds and supernovae\, dominate the observed structure of n
 eutral hydrogen within many galaxies\, including the nearby Small and 
 Large Magellanic Clouds\, which we can study with a physical resolutio
 n unmatched anywhere else in the Universe.  As the most numerous galax
 ies in the Universe\, dwarf galaxies may be important candidates for p
 opulating the intergalactic medium with enriched gas. Although star fo
 rmation rates in dwarf galaxies can be lower than their more massive\,
  starburst counterparts\, these low mass systems have small gravitatio
 nal potential wells and thereby find it difficult to maintain their st
 ar-forming material in the presence of intense stellar feedback.  In t
 his talk I will present new commissioning atomic hydrogen (HI) data fr
 om the Australian SKA Pathfinder (ASKAP) in which we have discovered t
 hat the Small Magellanic Cloud (SMC) has massive stellar feedback driv
 en HI outflows.  The outflows are comprised of cold filamentary gas ex
 tending up ~2 kpc from the main galaxy\, with temperatures of T< 500 K
  and widths as small as 50 pc.  We estimate a significant atomic gas m
 ass flux in the range 0.2 - 1 solar mass per year\, which may contribu
 te to feeding the Magellanic Stream.  I will also discuss future plans
  for the Magellanic System with Galactic ASKAP Survey.<br>
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URL:https://www.physics.wisc.edu/events/?id=5102
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