Can we measure individual black-hole spins from gravitational-wave observations?

被引：79

作者：

Puerrer, Michael ^{[1
,2
]}

Hannam, Mark ^{[2
]}

Ohme, Frank ^{[2
]}

机构：

[1] Albert Einstein Inst, Max Planck Inst Gravitat Phys, Muhlenberg 1, D-14476 Potsdam, Germany

[2] Cardiff Univ, Sch Phys & Astron, Queens Bldg, Cardiff CF24 3AA, S Glam, Wales

来源：

PHYSICAL REVIEW D | 2016年 / 93卷 / 08期

基金：

英国科学技术设施理事会; 欧洲研究理事会;

关键词：

COMPACT BINARIES; OBJECTS;

D O I：

10.1103/PhysRevD.93.084042

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Measurements of black-hole spins from gravitational-wave observations of black-hole binaries with ground-based detectors are known to be hampered by partial degeneracies in the gravitational-wave phasing: between the two component spins, and between the spins and the binary's mass ratio, at least for signals that are dominated by the binary's inspiral. Through the merger and ringdown, however, a different set of degeneracies apply. This suggests the possibility that, if the inspiral, merger and ringdown are all within the sensitive frequency band of a detector, we may be able to break these degeneracies and more accurately measure both spins. In this work we investigate our ability to measure individual spins for nonprecessing binaries, for a range of configurations and signal strengths, and conclude that in general the spin of the larger black hole will be measurable (at best) with observations from Advanced LIGO and Virgo. This implies that in many applications waveform models parameterized by only one effective spin will be sufficient. Our work does not consider precessing binaries or subdominant harmonics, although we provide some arguments why we expect that these will not qualitatively change our conclusions.

引用

页数：13

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