Merger of black hole-neutron star binaries: Nonspinning black hole case

Journal Article · Fri Dec 15 04:00:00 EST 2006 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.74.121503· OSTI ID:20868153

Shibata, Masaru ^[1]; Uryu, Koji ^[2]

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1. Graduate School of Arts and Sciences, University of Tokyo, Komaba, Meguro, Tokyo 153-8902 (Japan)
2. Department of Physics, University of Wisconsin-Milwaukee, P.O. Box413, Milwaukee, Wisconsin 53201 (United States)

We perform a simulation for merger of a black hole (BH)-neutron star (NS) binary in full general relativity preparing a quasicircular state as initial condition. The BH is modeled by a moving puncture with no spin and the NS by the {gamma}-law equation of state with {gamma}=2. Corotating velocity field is assumed for the NS. The mass of the BH and the rest-mass of the NS are chosen to be {approx_equal}3.2M{sub {center_dot}} and {approx_equal}1.4M{sub {center_dot}} with relatively large radius of the NS {approx_equal}14 km. The NS is tidally disrupted near the innermost stable orbit but {approx}80% of the material is swallowed into the BH with small disk mass {approx}0.3M{sub {center_dot}} even for such small BH mass {approx}3M{sub {center_dot}}. The result indicates that the system of a BH and a massive disk of {approx}M{sub {center_dot}} is not formed from nonspinning BH-NS binaries, although a disk of mass {approx}0.1M{sub {center_dot}} is a possible outcome.

• OSTI ID: 20868153
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 12 Vol. 74; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BLACK HOLES
COMPUTERIZED SIMULATION
COSMOLOGY
EQUATIONS OF STATE
GENERAL RELATIVITY THEORY
NEUTRON STARS
ORBITS
REST MASS
SPIN
VELOCITY