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Anisotropic mass ejection from black hole-neutron star binaries: Diversity of electromagnetic counterparts

Koutarou Kyutoku, Kunihito Ioka, and Masaru Shibata
Phys. Rev. D 88, 041503(R) – Published 21 August 2013

Abstract

The merger of black hole-neutron star binaries can eject substantial material with the mass 0.010.1M when the neutron star is disrupted prior to the merger. The ejecta shows significant anisotropy, and travels in a particular direction with the bulk velocity 0.2c. This is drastically different from the binary neutron star merger, for which ejecta is nearly isotropic. Anisotropic ejecta brings electromagnetic-counterpart diversity which is unique to black hole-neutron star binaries, such as viewing-angle dependence, polarization, and proper motion. The kick velocity of the black hole, gravitational-wave memory emission, and cosmic-ray acceleration are also discussed.

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  • Received 27 May 2013

DOI:https://doi.org/10.1103/PhysRevD.88.041503

© 2013 American Physical Society

Authors & Affiliations

Koutarou Kyutoku1, Kunihito Ioka2, and Masaru Shibata3

  • 1Department of Physics, University of Wisconsin-Milwaukee, P.O. Box 413, Milwaukee, Wisconsin 53201, USA
  • 2Theory Center, Institute of Particles and Nuclear Studies, KEK, Tsukuba 305-0801, Japan
  • 3Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502, Japan

See Also

Dynamical mass ejection from black hole-neutron star binaries

Koutarou Kyutoku, Kunihito Ioka, Hirotada Okawa, Masaru Shibata, and Keisuke Taniguchi
Phys. Rev. D 92, 044028 (2015)

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Issue

Vol. 88, Iss. 4 — 15 August 2013

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