Final Spins and Masses from Binary Black Hole Mergers

Details Final Spins and Masses from Binary Black Hole Mergers Final Spins and Masses from Binary Black Hole Mergers

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21347702k&link_type=abstract

American Astronomical Society, AAS Meeting #213, #477.02; Bulletin of the American Astronomical Society, Vol. 41, p.443

Astronomy and Astrophysics

Astronomy

Scientific paper

Gravitational waves carry away both energy and angular momentum as binary black holes inspiral and merge. The relative efficiency with which they are radiated determines whether the spin of the final black hole saturates the Kerr limit. Extrapolating from the test-particle limit, we propose expressions for the final mass and spin for mergers with initial spins aligned or anti-aligned with the orbital angular momentum. We predict the the final spin at plunge for equal-mass non-spinning binaries to better than 1%, and that equal-mass maximally spinning aligned mergers lead to nearly maximally spinning final black holes. We also find black holes can always be spun up by aligned mergers provided the mass ratio is small enough.

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