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SUMMARY:María José Bustamante Rosell (Texas U.)
DTSTART:20201210T143000Z
DTEND:20201210T153000Z
DTSTAMP:20260423T021238Z
UID:CENTRA/16
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/CENTRA/16/">
 Self-torque and frame nutation in binary black hole simulations</a>\nby Ma
 ría José Bustamante Rosell (Texas U.) as part of CENTRA Seminar\n\n\nAbs
 tract\nWe investigate the precession of the spin of the smaller black hole
  in binary black hole simulations. By considering a sequence of binaries a
 t higher mass ratios\, we approach the limit of geodetic precession of a t
 est spin. This precession is corrected by the ``self-torque'' due to the s
 maller black hole's own spacetime curvature. We find that the spins underg
 o spin nutations which are not described in conventional descriptions of s
 pin precession\, an effect that has been noticed previously in simulations
 . These nutations arise because the spins are not measured in a frame wher
 e the smaller hole is stationary. We develop a simple model for these fram
 e nutations\, extract the instantaneous spin precession rate\, and compare
  our results to PN and extreme-mass-ratio approximations for the self-torq
 ue.\n
LOCATION:https://researchseminars.org/talk/CENTRA/16/
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