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Black hole-neutron star mergers for 10 M_☉ black holes

Foucart, Francois and Duez, Matthew D. and Kidder, Lawrence E. and Scheel, Mark A. and Szilagyi, Bela and Teukolsky, Saul A. (2012) Black hole-neutron star mergers for 10 M_☉ black holes. Physical Review D, 85 (4). Art. No. 044015. ISSN 0556-2821. http://resolver.caltech.edu/CaltechAUTHORS:20120306-070840141

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Abstract

General relativistic simulations of black hole-neutron star mergers have currently been limited to low-mass black holes (M_(BH)≤7  M_⊙), even though population synthesis models indicate that a majority of mergers might involve more massive black holes (M_(BH)≥10  M_⊙). We present the first general relativistic simulations of black hole-neutron star mergers with M_(BH_∼10  M_⊙. For massive black holes, the tidal forces acting on the neutron star are usually too weak to disrupt the star before it reaches the innermost stable circular orbit of the black hole. Varying the spin of the black hole in the range α_(BH)/M_(BH)=0.5–0.9, we find that mergers result in the disruption of the star and the formation of a massive accretion disk only for large spins α_(BH)/M_(BH)≥0.7–0.9. From these results, we obtain updated constraints on the ability of black hole-neutron star mergers to be the progenitors of short gamma-ray bursts as a function of the mass and spin of the black hole. We also discuss the dependence of the gravitational wave signal on the black hole parameters, and provide waveforms and spectra from simulations beginning 7–8 orbits before the merger.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1103/PhysRevD.85.044015DOIArticle
http://link.aps.org/doi/10.1103/PhysRevD.85.044015PublisherArticle
http://prd.aps.org/abstract/PRD/v85/i4/e044015PublisherArticle
Additional Information:© 2012 American Physical Society. Received 7 November 2011; published 7 February 2012. We thank Dan Hemberger, Jeff Kaplan, Geoffrey Lovelace, Curran Muhlberger, and Harald Pfeiffer for useful discussions and suggestions. This work was supported in part by a grant from the Sherman Fairchild Foundation; by NSF Grants No. PHY-0969111 and No. PHY-1005426 and NASA Grant No. NNX09AF96G at Cornell; and by NSF Grants No. PHY-0601459, No. PHY-1068881, and No. PHY-1005655, and NASA Grant No. NNX09AF97G at Caltech. M. D. acknowledges support through NASA Grant No. NNX11AC37G and NSF Grant No. PHY- 1068243. This research was supported in part by the NSF through TeraGrid [50] resources provided by NCSA’s Lonestar cluster under Grant No. TG-PHY990007N. Computations were also performed on the Caltech compute cluster Zwicky, funded by NSF MRI Grant No. PHY- 0960291, and on the GPC supercomputer at the SciNet HPC Consortium. SciNet is funded by the Canada Foundation for Innovation under the auspices of Compute Canada, the Government of Ontario; Ontario Research Fund-Research Excellence, and the University of Toronto.
Group:TAPIR
Funders:
Funding AgencyGrant Number
Sherman Fairchild FoundationUNSPECIFIED
NSFPHY-0969111
NSFPHY-1005426
NASANNX09AF96G
NSFPHY-0601459
NSFPHY-1068881
NSFPHY-1005655
NASANNX09AF97G
NASA NNX11AC37G
NSFPHY-1068243
NSF TeraGrid UNSPECIFIED
NSFTG-PHY990007N
NSFPHY-0960291
Canada Foundation for InnovationUNSPECIFIED
Classification Code:PACS: 04.25.dg, 04.30.-w, 04.40.Dg, 47.75.+f
Record Number:CaltechAUTHORS:20120306-070840141
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20120306-070840141
Official Citation:Black hole-neutron star mergers for 10  M⊙ black holes Francois Foucart, Matthew D. Duez, Lawrence E. Kidder, Mark A. Scheel, Bela Szilagyi, and Saul A. Teukolsky Published 7 February 2012 (12 pages) 044015
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:29581
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:13 Mar 2012 20:44
Last Modified:19 Aug 2014 21:21

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