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  Gravitational-wave background from compact objects embedded in AGN accretion disks

Sigl, G., Schnittman, J., & Buonanno, A. (2007). Gravitational-wave background from compact objects embedded in AGN accretion disks. Physical Review D, 75: 024034. doi:10.1103/PhysRevD.75.024034.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0018-D7A8-8 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0018-D7AD-D
Genre: Journal Article

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 Creators:
Sigl, Guenter, Author
Schnittman, Jeremy, Author
Buonanno, Alessandra1, 2, Author              
Affiliations:
1Physics Department, University of Maryland, ou_persistent22              
2Astrophysical and Cosmological Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_1933290              

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Free keywords: Astrophysics, astro-ph,General Relativity and Quantum Cosmology, gr-qc
 Abstract: We consider a model in which massive stars form in a self-gravitating accretion disk around an active galactic nucleus (AGN). 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 intrinsic hard X-ray AGN luminosity function to estimate expected event rates and signal strengths. We find that these sources will produce a continuous low-frequency (<~ mHz) background detectable by LISA if more than 1% of the accreted matter is in the form of compact objects. For compact objects with masses >~ 10 solar masses the last stages of the inspiral events should be resolvable above a few mHz, with rates as high as a few hundred per year.

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 Dates: 2006-10-232007
 Publication Status: Published in print
 Pages: 14 revtex pages, 14 figures
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: astro-ph/0610680
DOI: 10.1103/PhysRevD.75.024034
URI: http://arxiv.org/abs/astro-ph/0610680
 Degree: -

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Title: Physical Review D
  Other : Phys. Rev. D.
Source Genre: Journal
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Publ. Info: Lancaster, Pa. : American Physical Society
Pages: - Volume / Issue: 75 Sequence Number: 024034 Start / End Page: - Identifier: ISSN: 0556-2821
CoNE: /journals/resource/111088197762258