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Inferences about Supernova Physics from Gravitational-Wave Measurements: GW151226 Spin Misalignment as an Indicator of Strong Black-Hole Natal Kicks

O’Shaughnessy, Richard and Gerosa, Davide and Wysocki, Daniel (2017) Inferences about Supernova Physics from Gravitational-Wave Measurements: GW151226 Spin Misalignment as an Indicator of Strong Black-Hole Natal Kicks. Physical Review Letters, 119 (1). Art. No. 011101. ISSN 0031-9007. http://resolver.caltech.edu/CaltechAUTHORS:20170706-111147581

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Abstract

The inferred parameters of the binary black hole GW151226 are consistent with nonzero spin for the most massive black hole, misaligned from the binary’s orbital angular momentum. If the black holes formed through isolated binary evolution from an initially aligned binary star, this misalignment would then arise from a natal kick imparted to the first-born black hole at its birth during stellar collapse. We use simple kinematic arguments to constrain the characteristic magnitude of this kick, and find that a natal kick v_k≳50  km/s must be imparted to the black hole at birth to produce misalignments consistent with GW151226. Such large natal kicks exceed those adopted by default in most of the current supernova and binary evolution models.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1103/PhysRevLett.119.011101DOIArticle
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.119.011101PublisherArticle
https://physics.aps.org/synopsis-for/10.1103/PhysRevLett.119.011101Featured InPhysics : Synopsis
Additional Information:© 2017 American Physical Society. Received 13 April 2017; published 6 July 2017. We thank Krzysztof Belczynski, Emanuele Berti, Michael Kesden, Will Farr, Daniel Holz, and Gijs Nelemans for carefully reading our manuscript, and our anonymous referees for their helpful feedback. R.O’S. and D. G. gratefully acknowledge the hospitality of the Aspen Center for Physics, supported by NSF Grant No. PHY-1066293, where this work was initiated. R.O’S. is supported by NSF Grants No. AST-1412449, No. PHY-1505629, and No. PHY-1607520. D. G. is supported by NASA through Einstein Postdoctoral Fellowship Grant No. PF6-170152 awarded by the Chandra X-ray Center, which is operated by the Smithsonian Astrophysical Observatory for NASA under Contract No. NAS8-03060.
Group:TAPIR
Funders:
Funding AgencyGrant Number
NSFPHY-1066293
NSFAST-1412449
NSFPHY-1505629
NSFPHY-1607520
NASA Einstein FellowshipPF6-170152
NASANAS8-03060
Record Number:CaltechAUTHORS:20170706-111147581
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20170706-111147581
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:78810
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:06 Jul 2017 20:49
Last Modified:06 Jul 2017 20:49

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