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PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-3150
DTSTART:20131107T213000Z
DURATION:PT1H0M0S
DTSTAMP:20260307T001634Z
LAST-MODIFIED:20131022T131911Z
LOCATION:4421 Sterling Hall
SUMMARY:Massive Star Formation Through the Universe\, Astronomy Colloq
 uium\, Jonathan Tan\, University of Florida
DESCRIPTION:Massive stars have played a dominant role in shaping our u
 niverse since its earliest times\, but there is no consensus on the me
 chanism by which they form. I review the physical processes thought to
  be important in massive star formation\, concentrating on a particula
 r theoretical model\, Turbulent Core Accretion. This assumes the initi
 al conditions are massive\, turbulent\, magnetized cloud cores of gas 
 and dust that are reasonably close to virial equilibrium. We test this
  via theoretical simulations of the physics and chemistry of the inter
 stellar medium and observational searches for these cores. We next con
 sider the protostellar collapse phase as a massive star grows from the
  core. Various forms of feedback become important in reducing the effi
 ciency of accretion\, although it is not clear if one particular mecha
 nism operates to set a fundamental limit on the maximum stellar mass. 
 Again\, these theoretical ideas can be tested by observations of massi
 ve stars forming in our Galaxy today. Finally\, I discuss an applicati
 on of massive star formation theory to the early universe: how massive
  were the first stars and could they have been the progenitors of supe
 rmassive black holes? 
URL:https://www.physics.wisc.edu/events/?id=3150
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