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UID:UW-Physics-Event-1026
DTSTART:20080214T214500Z
DURATION:PT1H0M0S
DTSTAMP:20260409T030819Z
LAST-MODIFIED:19700101T060000Z
LOCATION:6515 Sterling Hall (coffee at 3:30 pm in 6521 Sterling)
SUMMARY:Stellar Archaeology: Galaxy Evolution from the Ground Up\, Ast
 ronomy Colloquium\, Jason Harris University of AZ - Steward Observator
 y
DESCRIPTION:Two of the greatest triumphs of late twentieth-century ast
 rophysics were the understanding of large-scale structure formation (t
 hrough hierarchical collapse in a universe dominated by cold dark matt
 er)\, and an exquisite\, quantitative understanding of stellar evoluti
 on. Usually regarded as completely separate fields\, they are neverthe
 less connected by the physics which govern star formation in galaxies.
  If CDM simulations are to reproduce the galaxy populations as we obse
 rve them in the universe\, then we will need to develop a robust\, qua
 ntitative theory of the physical processes which govern star formation
  on galactic scales. Likewise\, while we now have a comprehensive unde
 rstanding of the evolution of stellar populations\, our ideas are much
  less detailed when it comes to protostellar populations\, the agents 
 that trigger star formation\, and the feedback processes that may sust
 ain or quench it. I will present some of my ongoing work in stellar ar
 chaeology that is addressing the need for a quantitative star formatio
 n theory\, through detailed explorations of the stellar and protostell
 ar populations in nearby galaxies.
URL:https://www.physics.wisc.edu/events/?id=1026
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