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SUMMARY:Self-force approach to the two-body problem in GR - Leor Barack (U
 niversity of Southampton)
DTSTART:20161130T141500Z
DTEND:20161130T151500Z
UID:TALK68144@talks.cam.ac.uk
CONTACT:Shahar Hadar
DESCRIPTION:The radiative dynamics in a gravitationally-bound two-body sys
 tem with a small mass ratio can be described using a perturbative approach
  whereby corrections to the geodesic motion of the smaller object (due to 
 radiation reaction\, internal structure\, etc.) are accounted for order by
  order in the mass ratio\, invoking the notion of ``gravitational self-for
 ce''. The ongoing experimental effort to detect gravitational waves has in
  the past two decades motivated a program to obtain a rigorous formulation
  of the self-force and apply it numerically to describe the gravitational-
 wave signature of relevant inspiralling compact objects. I will review the
  theory of gravitational self-force in curved spacetime\, describe how thi
 s theory is being implemented today in actual calculations\, and discuss c
 urrent frontiers.  I will show results from recent calculations of gauge-i
 nvariant post-geodesic effects (like the finite-mass corrections to the ra
 tes of periastron advance and spin precession)\, and highlight the way in 
 which such calculations allow us to make a fruitful contact with other app
 roaches to the two-body problem.
LOCATION:MR2\, Centre for Mathematical Sciences
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