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  Relativistic encounters in dense stellar systems

Amaro-Seoane, P., & Freitag, M. D. (2011). Relativistic encounters in dense stellar systems. Monthly Notices of the Royal Astronomical Society, 412(1), 551-554. doi:10.1111/j.1365-2966.2010.17925.x.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000E-EAB3-C Version Permalink: http://hdl.handle.net/11858/00-001M-0000-000E-EAB4-A
Genre: Journal Article

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1009.1870 (Preprint), 224KB
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 Creators:
Amaro-Seoane, Pau1, Author              
Freitag, Marc Dewi, Author
Affiliations:
1Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, escidoc:24013              

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Free keywords: Astrophysics, Cosmology and Extragalactic Astrophysics, astro-ph.CO, Astrophysics, Galaxy Astrophysics, astro-ph.GA,General Relativity and Quantum Cosmology, gr-qc
 Abstract: Two coalescing black holes (BHs) represent a conspicuous source of gravitational waves (GWs). The merger involves 17 parameters in the general case of Kerr BHs, so that a successful identification and parameter extraction of the information encoded in the waves will provide us with a detailed description of the physics of BHs. A search based on matched-filtering for characterization and parameter extraction requires the development of some $10^{15}$ waveforms. If a third additional BH perturbed the system, the waveforms would not be applicable, and we would need to increase the number of templates required for a valid detection. In this letter, we calculate the probability that more than two BHs interact in the regime of strong relativity in a dense stellar cluster. We determine the physical properties necessary in a stellar system for three black holes to have a close encounter in this regime and also for an existing binary of two BHs to have a strong interaction with a third hole. In both cases the event rate is negligible. While dense stellar systems such as galactic nuclei, globular clusters and nuclear stellar clusters are the breeding grounds for the sources of gravitational waves that ground-based detectors like Advanced LIGO and Advanced VIRGO will be exploring, the analysis of the waveforms in full general relativity needs only to evaluate the two-body problem. This reduces the number of templates of waveforms to create by orders of magnitude.

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 Dates: 2010-09-092010-10-272011
 Publication Status: Published in print
 Pages: A small note of 5 pages, accepted for publication MNRAS after minor modifications
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1009.1870
DOI: 10.1111/j.1365-2966.2010.17925.x
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Title: Monthly Notices of the Royal Astronomical Society
Source Genre: Journal
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Publ. Info: Oxford : Blackwell Science
Pages: - Volume / Issue: 412 (1) Sequence Number: - Start / End Page: 551 - 554 Identifier: ISSN: 1365-8711
CoNE: http://pubman.mpdl.mpg.de/cone/journals/resource/1000000000024150