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.