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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-3142
DTSTART:20131114T213000Z
DTEND:20131114T230000Z
DTSTAMP:20260419T212309Z
LAST-MODIFIED:20131015T154228Z
LOCATION:4421 Sterling Hall
SUMMARY:Diagnosing Elliptical Galaxy Formation with Simulations\, Astr
 onomy Colloquium\, Greg Snyder\, STSci
DESCRIPTION:A challenge in extragalactic astronomy is that we cannot w
 atch what happens to galaxies before and after they are observed.  In 
 particular\, it remains debated whether galaxy mergers or internal pro
 cesses drive supermassive black hole growth\, trigger luminous starbur
 sts\, and shape the population of galaxies we see today.  However\, gi
 ven increasingly available computer resources\, it is now possible to 
 predict how galaxies might evolve according to a huge variety of obser
 vations.  With hydrodynamical simulations followed by dust radiative t
 ransfer\, I examine the formation of elliptical galaxies through three
  putative phases:  dust-obscured starburst\, transition object\, and r
 ed spheroid.  I derive an idealized JWST-accessible mid-infrared diagn
 ostic using model spectra from simulations of merger-induced starburst
 s.  I use similar models to reconcile the numbers of optically selecte
 d post-starburst galaxies with independent estimates of the galaxy mer
 ger rate.  To conclude\, I describe efforts to build a aEurooemock obs
 ervatoryaEuro from large-volume cosmological hydrodynamical simulation
 s\, with which observations of many types can be brought to bear to co
 nstrain the physics of galaxy formation.  
URL:https://www.physics.wisc.edu/events/?id=3142
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