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PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-1095
DTSTART:20080415T204500Z
DURATION:PT1H0M0S
DTSTAMP:20260423T041043Z
LAST-MODIFIED:20080414T160941Z
LOCATION:6515 Sterling Hall (coffee at 3:30 pm in 6521 Sterling)
SUMMARY:Globular Clusters\, Galaxy Formation\, Dark Matter\, and Black
  Holes\, Astronomy Colloquium\, Kathy Rhode\, University of Indiana
DESCRIPTION:Globular clusters (GCs) serve as valuable tracers of the o
 rigins and star formation histories of galaxies. I will present select
 ed results from a wide-field optical imaging survey of the GC systems 
 of elliptical and spiral galaxies beyond the Local Group. Quantifying 
 the global properties of the galaxies' GC systems provides an importan
 t test of specific models for the formation of giant galaxies. The sur
 vey results are generally consistent with a hierarchical galaxy format
 ion scenario in which metal-poor GCs form at high redshift in protogal
 actic building blocks and metal-rich GC populations are built up over 
 time in gas-rich mergers. I will also summarize our ongoing efforts to
  measure the radial velocities of the GCs found in the survey\, and sh
 ow how this allows us to trace the structure of the host galaxies' out
 er halos. Finally\, I will briefly describe the discovery of a black h
 ole X-ray source in one of the globular clusters we identified in the 
 Virgo elliptical galaxy NGC 4472.
URL:https://www.physics.wisc.edu/events/?id=1095
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