Gravitational waves from a dust disk around a Schwarzschild black hole

Details Gravitational waves from a dust disk around a Schwarzschild black hole Gravitational waves from a dust disk around a Schwarzschild black hole

2005-07-07

arxiv.org/abs/gr-qc/0507030v2

Phys.Rev. D74 (2006) 024001

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

v1: 13 pages with 10 figures, revtex4.cls. Submitted to Physical Review D; v2: 13 pages with 12 figures, revtex4.cls. Physical

Scientific paper

10.1103/PhysRevD.74.024001

We investigate gravitational waves from a dust disk around a Schwarzschild black hole to focus on whether we can extract any of its physical properties from a direct detection of gravitational waves. We adopt a black hole perturbation approach in a time domain, which is a satisfactory approximation to illustrate a dust disk in a supermassive black hole. We find that we can determine the radius of the disk by using the power spectrum of gravitational waves and that our method to extract the radius works for a disk of arbitrary density distribution. Therefore we believe a possibility exists for determining the radius of the disk from a direct observation of gravitational waves detected by the Laser Interferometer Space Antenna.

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