Final spin of a coalescing black-hole binary: An effective-one-body approach

被引:44
作者
Damour, Thibault
Nagar, Alessandro
机构
[1] Inst Hautes Etud Sci, F-91440 Bures Sur Yvette, France
[2] Politecn Torino, Dipartimento Fis, I-10129 Turin, Italy
[3] Ist Nazl Fis Nucl, I-10125 Turin, Italy
来源
PHYSICAL REVIEW D | 2007年 / 76卷 / 04期
关键词
D O I
10.1103/PhysRevD.76.044003
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We update the analytical estimate of the final spin of a coalescing black-hole binary derived within the effective-one-body (EOB) approach. We consider unequal-mass nonspinning black-hole binaries. It is found that a more complete account of relevant physical effects (higher post-Newtonian accuracy, ringdown losses) allows the analytical EOB estimate to "converge towards" the recently obtained numerical results within 2%. This agreement illustrates the ability of the EOB approach to capture the essential physics of coalescing black-hole binaries. Our analytical approach allows one to estimate the final spin of the black hole formed by coalescing binaries in a mass range [nu=m(1)m(2)/(m(1)+m(2))(2)< 0.16] which is not presently covered by numerical simulations.
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页数:8
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