Effects of Wandering on the Coalescence of Black Hole Binaries in Galactic Centers | Zendy

Pinaki Chatterjee | Zendy; Lars Hernquist | Zendy; Abraham Loeb | Zendy

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Effects of Wandering on the Coalescence of Black Hole Binaries in Galactic Centers

Author(s) -

Pinaki Chatterjee,

Lars Hernquist,

Abraham Loeb

Publication year - 2003

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/375552

Subject(s) - physics , astrophysics , galaxy , gravitational wave , coalescence (physics) , binary number , gravitation , black hole (networking) , astronomy , binary black hole , computer network , routing protocol , routing (electronic design automation) , arithmetic , mathematics , computer science , link state routing protocol

We examine whether massive binary black holes in spherically symmetric bulgesof galaxies can achieve coalescence through the emission of gravitationalradiation under the action of stellar dynamical processes alone. In particular,we address the importance of the Brownian motion of a binary's center-of-massto its continued interaction with stellar orbits that allows it to keephardening: the restoring force holding the binary at the center decreases as itdepletes the central stellar density, causing the amplitude of wandering toincrease. We use an analytical model and N-body simulations to calculate thetime required to reach the gravitational-radiation dominated stage. We findthat a substantial fraction of all massive binaries in galaxies can coalescewithin a Hubble time.Comment: 22 pages, 4 figures, submitted to Ap

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