中子星-黑洞双星系统中中子星潮汐瓦解的引力波观测前景。

Prospects for gravitational-wave observations of neutron-star tidal disruption in neutron-star-black-hole binaries.

作者信息

Vallisneri M

机构信息

Theoretical Astrophysics 130-33, California Institute of Technology, Pasadena, California 91125 and INFN, Sezione di Milano, Gruppo Collegato di Parma/Università di Parma, 43100 Parma, Italy.

出版信息

Phys Rev Lett. 2000 Apr 17;84(16):3519-22. doi: 10.1103/PhysRevLett.84.3519.

DOI:10.1103/PhysRevLett.84.3519

PMID:11019135

Abstract

For an inspiraling neutron-star-black-hole (NS-BH) binary, we estimate the gravity-wave frequency f(td) at the onset of NS tidal disruption. We model the NS as a tidally distorted, homogeneous, Newtonian ellipsoid on a circular, equatorial geodesic around a Kerr BH. We find that f(td) depends strongly on the NS radius R, and estimate that LIGO-II (ca. 2006-2008) might measure R to 15% precision at 140 Mpc ( approximately 1 event/yr under current estimates). This suggests that LIGO-II might extract valuable information about the NS equation of state from tidal-disruption waves.

摘要

对于一个正在合并的中子星 - 黑洞（NS - BH）双星系统，我们估算了中子星潮汐瓦解开始时的引力波频率f(td)。我们将中子星建模为一个在围绕克尔黑洞的圆形赤道测地线上呈潮汐畸变的、均匀的牛顿椭球体。我们发现f(td)强烈依赖于中子星半径R，并估计LIGO - II（约2006 - 2008年）在140兆秒差距处可能以15%的精度测量R（根据当前估计约每年1次事件）。这表明LIGO - II可能从潮汐瓦解波中提取有关中子星状态方程的有价值信息。