High-spin binary black hole mergers

Abstract

We study identical mass black hole binaries with spins perpendicular to the binary's orbital plane. These binaries have individual spins ranging from $s/m^2=-0.90$ to 0.90, ($s_1=s_2$ in all cases) which is near the limit possible with standard Bowen-York puncture initial data. The extreme cases correspond to the largest initial spin simulations to date. Our results expand the parameter space covered by Rezzolla {\it et al.} and, when combining both data sets, we obtain estimations for the minimum and maximum values for the intrinsic angular momenta of the remnant of binary black hole mergers of $J/M^2=0.341\pm 0.004$ and $0.951\pm 0.004$ respectively. Note, however, that these values are reached through extrapolation to the singular cases $|s_1|=|s_2|=1$ and thus remain as {\it estimates} until full-fledged numerical simulations provide confirmation.

8 pages, 7 figures. Changed to match the version accepted for publication in PRD

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