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SUMMARY:Spin-orbit resonances: unveiling black-hole binary dynamics on bot
 h stellar-mass and supermassive scale - Davide Gerosa (DAMTP/University of
  Cambridge)
DTSTART:20140502T120000Z
DTEND:20140502T130000Z
UID:TALK52136@talks.cam.ac.uk
CONTACT:Helvi Witek
DESCRIPTION:Black-hole binaries are ideal targets to test strong-field gra
 vitational interactions. Double black-hole systems are astrophysically rel
 evant on both stellar-mass scale (as the final endpoint of massive binary-
 stars' life) and galactic scale (where they form as a consequence of galax
 y mergers).\nWhen the inspiral of spinning black-hole binaries is consider
 ed\, Post-Newtonian theory predicts the existence of two one-parameter fam
 ilies of equilibrium solutions ("resonances") in which the angular momentu
 m and both spins share a common plane and precess at the same frequency. T
 he two families are differentiated by either aligned or anti-aligned spin 
 components in the orbital plane but both resonances have the capacity to a
 ttract generic non-resonant configurations.\nSpin-orbit resonances are rel
 evant to shape astrophysical black-hole binary populations. Stellar-mass b
 lack-hole binaries are promising gravitational-wave sources for ground-bas
 ed detectors: we show how the gravitational-wave signals emitted from the 
 two resonant families consist in powerful\, viable\, probes of astrophysic
 al processes in the binary formation and evolution. On the other hand\, su
 permassive black-hole binaries may be ejected from their galaxies after me
 rging events: the kick distribution (and therefore the black-hole occupati
 on fraction) is deeply modified when spin-orbit resonances are properly co
 nsidered.
LOCATION:Pavilion B Potter Room (B1.19)
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