Energy and angular momentum flow into a black hole in a binary - art. no. 104020

Authors
Citation
K. Alvi, Energy and angular momentum flow into a black hole in a binary - art. no. 104020, PHYS REV D, 6410(10), 2001, pp. 4020
Citations number
26
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW D
ISSN journal
0556-2821 → ACNP
Volume
6410
Issue
10
Year of publication
2001
Database
ISI
SICI code
0556-2821(20011115)6410:10<4020:EAAMFI>2.0.ZU;2-5
Abstract
As a black hole in a binary spirals in gradually from large separation, ene rgy and angular momentum flow not only to infinity but also into or out of the hole. In addition, the hole's horizon area increases slowly during this process. In this paper, the changes in the black hole's mass, spin, and ho rizon area during inspiral are calculated for a hole in a circular binary w ith a companion body of possibly comparable mass. When the binary is compos ed of equal mass black holes that have spins aligned with the orbital angul ar momentum and are rapidly rotating (with spins 99.8% of their maximal val ues), it is found that the fractional increase in the surface area of each hole's horizon is 1% by the time the binary spirals down to a separation b of 6M (where M is the binary's total mass), and 7% down to b = 2M. The flow of energy and angular momentum into the black holes' horizons changes the number of gravitational-wave cycles in the LIGO band by no more than a tent h of a cycle by the time the binary reaches b = 2M. The results obtained in this paper are relevant for the detection and analysis of gravitational wa ves from binary systems containing a black hole.