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Gravitational Waves from Compact Objects Accreting onto Active Galactic Nuclei

Abstract : We consider a model in which massive stars form in a self-gravitating accretion disk around an active galactic nucleus. These stars may evolve and collapse to form compact objects on a time scale shorter than the accretion time, thus producing an important family of sources for LISA. Assuming the compact object formation/inspiral rate is proportional to the steady-state gas accretion rate, we use the observed extra-galactic X-ray luminosity function to estimate expected event rates and signal strengths. We find that these sources will produce a continuous low-frequency background detectable by LISA if more than >~ 1% of the accreted matter is in the form of compact objects. For compact objects with m >~ 10 Msun, the last stages of the inspiral events should be resolvable above a few mHz, at a rate of ~10-100 per year.
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Contributor : Simone Lantz <>
Submitted on : Friday, January 19, 2007 - 11:43:52 AM
Last modification on : Monday, December 14, 2020 - 9:53:43 AM

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J.D. Schnittman, G. Sigl, A. Buonanno. Gravitational Waves from Compact Objects Accreting onto Active Galactic Nuclei. Sixth International LISA Symposium, Jun 2006, Greenbelt, United States. pp.437-443, ⟨10.1063/1.2405081⟩. ⟨in2p3-00125394⟩



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