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Initial data for black hole–neutron star binaries, with rotating stars

Tacik, Nick and Foucart, Francois and Pfeiffer, Harald P. and Muhlberger, Curran and Kidder, Lawrence E. and Scheel, Mark A. and Szilágyi, Béla (2016) Initial data for black hole–neutron star binaries, with rotating stars. Classical and Quantum Gravity, 33 (22). Art. No. 225012. ISSN 0264-9381. doi:10.1088/0264-9381/33/22/225012.

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The coalescence of a neutron star with a black hole is a primary science target of ground-based gravitational wave detectors. Constraining or measuring the neutron star spin directly from gravitational wave observations requires knowledge of the dependence of the emission properties of these systems on the neutron star spin. This paper lays foundations for this task, by developing a numerical method to construct initial data for black hole–neutron star binaries with arbitrary spin on the neutron star. We demonstrate the robustness of the code by constructing initial-data sets in large regions of the parameter space. In addition to varying the neutron star spin-magnitude and spin-direction, we also explore neutron star compactness, mass-ratio, black hole spin, and black hole spin-direction. Specifically, we are able to construct initial data sets with neutron stars spinning near centrifugal break-up, and with black hole spins as large as S_(BH) / M_(BH)^2 = 0.99.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Foucart, Francois0000-0003-4617-4738
Pfeiffer, Harald P.0000-0001-9288-519X
Kidder, Lawrence E.0000-0001-5392-7342
Additional Information:© 2016 IOP Publishing Ltd. Received 27 July 2016, revised 5 September 2016. Accepted for publication 20 September 2016. Published 25 October 2016. We gratefully acknowledge support for this research at Cornell and Caltech from the Sherman Fairchild Foundation and NSF grants PHY-1306125, PHY-1404569, AST-1333520, and AST-1333129, and at CITA from NSERC of Canada, the Canada Research Chairs Program, and the Canadian Institute for Advanced Research. Calculations were performed at the GPC supercomputer at the SciNet HPC Consortium [73]; SciNet is funded by: the Canada Foundation for Innovation (CFI) under the auspices of Compute Canada; the Government of Ontario; Ontario Research Fund (ORF)—Research Excellence; and the University of Toronto.
Group:TAPIR, Walter Burke Institute for Theoretical Physics
Funding AgencyGrant Number
Sherman Fairchild FoundationUNSPECIFIED
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
Canada Research Chairs ProgramUNSPECIFIED
Canadian Institute for Advanced Research (CIFAR)UNSPECIFIED
Canada Foundation for InnovationUNSPECIFIED
Government of OntarioUNSPECIFIED
Ontario Research Fund-Research ExcellenceUNSPECIFIED
University of TorontoUNSPECIFIED
Subject Keywords:black holes, neutron stars, numerical relativity, initial data
Issue or Number:22
Record Number:CaltechAUTHORS:20161025-110929028
Persistent URL:
Official Citation:Nick Tacik et al 2016 Class. Quantum Grav. 33 225012
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:71447
Deposited By: George Porter
Deposited On:25 Oct 2016 19:11
Last Modified:12 Jul 2022 19:43

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