On the accretion-induced QNM excitation of a Schwarzschild black hole

Details On the accretion-induced QNM excitation of a Schwarzschild black hole On the accretion-induced QNM excitation of a Schwarzschild black hole

2006-10-26

arxiv.org/abs/gr-qc/0610131v2

Phys.Rev.D75:044016,2007

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

15 pages, 12 figures, revised version. To appear in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.75.044016

By combining the numerical solution of the nonlinear hydrodynamics equations with the solution of the linear inhomogeneous Zerilli-Moncrief and Regge-Wheeler equations we investigate the properties of the gravitational radiation emitted during the axisymmetric accretion of matter onto a Schwarzschild black hole. The matter models considered include quadrupolar dust shells and thick accretion disks, permitting us to simulate situations which may be encountered at the end stages of stellar gravitational collapse or binary neutron star merger. We focus on the interference pattern appearing in the energy spectra of the emitted gravitational waves and on the amount of excitation of the quasi-normal modes of the accreting black hole. We show that, quite generically in the presence of accretion, the black hole ringdown is not a simple superposition of quasi-normal modes, although the fundamental mode is usually present and often dominates the gravitational-wave signal. We interpret this as due to backscattering of waves off the non-exponentially decaying part of the black-hole potential and to the finite spatial extension of the accreting matter. Our results suggest that the black-hole QNM contributions to the full gravitational-wave signal should be extremely small and possibly not detectable in generic astrophysical scenarios involving the accretion of extended distributions of matter.

Affiliated with

Also associated with

No associations

Rating

On the accretion-induced QNM excitation of a Schwarzschild black hole does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with On the accretion-induced QNM excitation of a Schwarzschild black hole, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the accretion-induced QNM excitation of a Schwarzschild black hole will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-169271