A semi-relativistic model for tidal interactions in BH-NS coalescing binaries

Ferrari, V., Gualtieri, L. and Pannarale, Francesco ORCID: https://orcid.org/0000-0002-7537-3210 2009. A semi-relativistic model for tidal interactions in BH-NS coalescing binaries. Classical and Quantum Gravity 26 (12) , 125004. 10.1088/0264-9381/26/12/125004

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Abstract

We study the tidal effects of a Kerr black hole on a neutron star in black hole–neutron star (BH–NS) binary systems by using a semi-analytical approach which describes the neutron star as a deformable ellipsoid. Relativistic effects on the neutron star self-gravity are taken into account by employing a scalar potential resulting from relativistic stellar structure equations. We calculate quasi-equilibrium sequences of BH–NS binaries and the critical orbital separation at which the star is disrupted by the black hole tidal field: the latter quantity is of particular interest because when it is greater than the radius of the innermost stable circular orbit, a short gamma-ray burst scenario may develop.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QB Astronomy Q Science > QC Physics
Additional Information:	Online publication date: 14 May 2009.
Publisher:	IOP Publishing
ISSN:	0264-9381
Last Modified:	25 Oct 2022 08:34
URI:	https://orca.cardiff.ac.uk/id/eprint/53468

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