Accurate and realistic initial data for black hole-neutron star binaries

Details Accurate and realistic initial data for black hole-neutron star binaries Accurate and realistic initial data for black hole-neutron star binaries

2006-09-13

arxiv.org/abs/gr-qc/0609044v5

Phys.Rev.D74:124002,2006; Erratum-ibid.D75:129903,2007

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Version including the erratum to be published in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.74.124002

This paper is devoted to the computation of compact binaries composed of one black hole and one neutron star. The objects are assumed to be on exact circular orbits. Standard 3+1 decomposition of Einstein equations is performed and the conformal flatness approximation is used. The obtained system of elliptic equations is solved by means of multi-domain spectral methods. Results are compared with previous work both in the high mass ratio limit and for one neutron star with very low compactness parameter. The accuracy of the present code is shown to be greater than with previous codes. Moreover, for the first time, some sequences containing one neutron star of realistic compactness are presented and discussed.

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