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SEQUENCE:0
UID:UW-Physics-Event-4285
DTSTART:20160929T203000Z
DTEND:20160929T220000Z
DTSTAMP:20260419T060100Z
LAST-MODIFIED:20160909T180836Z
LOCATION:4421 Sterling Hall\, Coffee and cookies 3:30 PM\, Talk at 3:4
 5 PM
SUMMARY:Nuclear clusters and (supermassive) black holes\, Astronomy Co
 lloquium\, Fabio Antonini\, Northwestern  University
DESCRIPTION:Massive stellar clusters are often found at the photometri
 c and kinematic centers of galaxies. Such nuclear clusters are the den
 sest stellar systems observed in the local universe\, representing a n
 atural environment where compact object binaries can dynamically form\
 , harden and merge. I will discuss the dynamical processes that lead t
 o the merger of black hole binaries in nuclear clusters in connection 
 to the origin of the binary black hole mergers recently detected by Ad
 vanced LIGO. I will show that nuclear clusters can produce a significa
 nt population of black hole binaries that merge in the local universe\
 , and that these binaries have clear differences in the statistical di
 stributions of their properties (e.g.\, mass\, eccentricity) when comp
 ared to those formed either in globular clusters or through isolated b
 inary evolution.  Finally\, I will consider the evolution of supermass
 ive black hole binaries that are formed in nuclear clusters during the
  merger of galaxies. The results of N-body and Monte Carlo simulations
  show that coalescence times fall in the range from 10^8 yr to a few G
 yr. These results constitute a fully stellar-dynamical solution to the
  ''final-parsec problem'' and imply a high rate of events for planned 
 low-frequency gravitational wave detectors like eLISA.
URL:https://www.physics.wisc.edu/events/?id=4285
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