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The merger of small and large black holes

Mösta, P. and Andersson, L. and Metzger, J. and Szilágyi, B. and Winicour, J. (2015) The merger of small and large black holes. Classical and Quantum Gravity, 32 (23). Art. No. 235003. ISSN 0264-9381.

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We present simulations of binary black-hole mergers in which, after the common outer horizon has formed, the marginally outer trapped surfaces (MOTSs) corresponding to the individual black holes continue to approach and eventually penetrate each other. This has very interesting consequences according to recent results in the theory of MOTSs. Uniqueness and stability theorems imply that two MOTSs which touch with a common outer normal must be identical. This suggests a possible dramatic consequence of the collision between a small and large black hole. If the penetration were to continue to completion, then the two MOTSs would have to coalesce, by some combination of the small one growing and the big one shrinking. Here we explore the relationship between theory and numerical simulations, in which a small black hole has halfway penetrated a large one.

Item Type:Article
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URLURL TypeDescription Paper
Mösta, P.0000-0002-9371-1447
Additional Information:© 2015 IOP Publishing Ltd. Received 22 January 2015, revised 9 September 2015. Accepted for publication 23 September 2015. Published 6 November 2015. We have benefited from discussions with B Krishnan and E Schnetter. JW’s research was supported by NSF grant PHY-1201276 to the University of Pittsburgh. PM and BS were supported by the Sherman Fairchild Foundation and NSF grants PHY-1440083, AST-1333520 and AST-1212170 at Caltech.
Funding AgencyGrant Number
Sherman Fairchild FoundationUNSPECIFIED
Subject Keywords:black holes, numerical relativity, trapped surfaces
Issue or Number:23
Record Number:CaltechAUTHORS:20160104-075213932
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Official Citation:P Mösta et al 2015 Class. Quantum Grav. 32 235003
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:63311
Deposited By: Ruth Sustaita
Deposited On:04 Jan 2016 18:19
Last Modified:09 Mar 2020 13:19

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