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VERSION:2.0
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PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-1822
DTSTART:20100406T203000Z
DTEND:20100406T220000Z
DTSTAMP:20260506T161500Z
LAST-MODIFIED:20100325T153856Z
LOCATION:3425 Sterling Hall
SUMMARY:Probing the Inner and Outer Milky Way\, Astronomy Colloquium\,
  Juna Kollmeier\, Carnegie Observatories
DESCRIPTION:The Milky Way provides an opportunity for a close-up inves
 tigation of the complex processes of galaxy and star formation. I will
  discuss recent efforts to do this by using rare\, but important\, pro
 bes of these phenomena. In the first portion of the talk I will presen
 t results on hypervelocity stars primarily from the Sloan Digital Sky 
 Survey. The distribution of these stars\, in physical properties and i
 n space\, allows us to place interesting limits on star formation and 
 dynamics at the Galactic Center as well as the possibility to constrai
 n the shape of the Milky Way's dark matter halo. I will discuss progre
 ss we have made toward these goals. In the second portion of the talk\
 , I will discuss how one can use RR Lyrae stars to probe the outer hal
 o of the Milky Way and find new and distant substructures that are dif
 ficult to probe by other means. Our recent confirmation of a distant s
 tructure in RR Lyrae stars highlights the power of this approach to un
 raveling the outer halo and showcases exciting possibilities for futur
 e all-sky time-domain surveys.
URL:https://www.physics.wisc.edu/events/?id=1822
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