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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-3347
DTSTART:20140508T203000Z
DTEND:20140508T220000Z
DTSTAMP:20260314T130923Z
LAST-MODIFIED:20140410T181500Z
LOCATION:4421 Sterling Hall
SUMMARY:The Disks of the Milky Way Galaxy\, Astronomy Colloquium\, Ros
 emary Wyse\, The John Hopkins University
DESCRIPTION:I will discuss our current understanding of the disk(s) of
  the Milky Way.  The vertical structure of stellar disks is determined
  by the relative importances of diverse physical processes\, including
  gaseous dissipation prior to star formation\, subsequent gas accretio
 n into the disk\, heating mechanisms such as interactions with transie
 nt spirals\, and the mass ratios and gas content of merging systems.  
 The radial structure reflects star-formation rates\, angular momentum 
 (re)distribution and interactions within the disk. The kinematic\, che
 mical and age distributions of the stellar populations of present-day 
 disks\, as a function of scale-height and scale-length\, provide furth
 er constraints on disk evolution.  Decomposition of disks into distinc
 t spatial components -- such as thin and thick -- is most meaningful w
 hen the spatial decomposition is accompanied by distinct stellar popul
 ations and/or different physical processes determining their propertie
 s. The most detailed information is available for stars in the Milky W
 ay galaxy and I will demonstrate this decomposition based on recent re
 sults for the Milky Way disks.
URL:https://www.physics.wisc.edu/events/?id=3347
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