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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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.
|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  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.|
|Classification Code:||PACS: 04.25.dg, 04.30.-w, 04.40.Dg, 47.75.+f|
|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.|
|Deposited By:||Ruth Sustaita|
|Deposited On:||13 Mar 2012 20:44|
|Last Modified:||26 Dec 2012 14:54|
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