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Published November 15, 2000 | Published + Submitted
Journal Article Open

Quasicircular orbits for spinning binary black holes

Abstract

Using an effective potential method we examine binary black holes where the individual holes carry spin. We trace out sequences of quasi-circular orbits and locate the innermost stable circular orbit (ISCO) as a function of spin. At large separations, the sequences of quasi-circular orbits match well with post-Newtonian expansions, although a clear signature of the simplifying assumption of conformal flatness is seen. The position of the ISCO is found to be strongly dependent on the magnitude of the spin on each black hole. At close separations of the holes, the effective potential method breaks down. In all cases where an ISCO could be determined, we found that an apparent horizon encompassing both holes forms for separations well inside the ISCO. Nevertheless, we argue that the formation of a common horizon is still associated with the breakdown of the effective potential method.

Additional Information

© 2000 American Physical Society. (Received 22 June 2000; published 19 October 2000) We thank Larry Kidder and Mark Scheel for helpful discussions. This work was supported in part by NSF grants PHY-9800737 and PHY-9900672 and NASA grant NAG5-7264 to Cornell University and NSF grant PHY-9988581 to Wake Forest University. Computations were performed on the IBM SP2 at Cornell Theory Center and on the Wake Forest University Department of Physics IBM SP2 with support from an IBM SUR grant.

Attached Files

Published - PhysRevD.62.104018.pdf

Submitted - 0006084

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September 15, 2023
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