Etienne 2008 模拟BH-NS并合

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应该成为一个经典文献吧. 短暴应该就是这个机制.

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Title:		Relativistic Simulations of Black Hole-Neutron Star Mergers: Effects of black-hole spin
Authors:		Etienne, Zachariah B.; Liu, Yuk Tung; Shapiro, Stuart L.; Baumgarte, Thomas W.
Publication:		eprint arXiv:0812.2245
Publication Date:		12/2008
Origin:		ARXIV
Keywords:		Astrophysics, General Relativity and Quantum Cosmology
Comment:		27 pages, 24 figures, submitted to Phys. Rev. D
Bibliographic Code:		2008arXiv0812.2245E

Abstract

Black hole-neutron star (BHNS) binary mergers are candidate engines for generating both short-hard gamma-ray bursts (SGRBs) and detectable gravitational waves. Using our most recent conformal thin-sandwich BHNS initial data and our fully general relativistic hydrodynamics code, which is now AMR-capable, we are able to efficiently and accurately simulate these binaries from large separations through inspiral, merger, and ringdown. We evolve the metric using the BSSN formulation with the standard moving puncture gauge conditions and handle the hydrodynamics with a high-resolution shock-capturing scheme. We explore the effects of BH spin (aligned and anti-aligned with the orbital angular momentum) by evolving three sets of initial data with BH:NS mass ratio q=3: the data sets are nearly identical, except the BH spin is varied between a/M = -0.5 (anti-aligned), 0.0, and 0.75. The number of orbits before merger increases with a/M, as expected. We also study the nonspinning BH case in more detail, varying q between 1, 3, and 5. We calculate gravitational waveforms for the cases we simulate and compare them to binary black-hole waveforms. Only a small disk (< m =" -0.5)" q="5)." m =" 0.75)"> Bibtex entry for this abstract Preferred format for this abstract (see Preferences)