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  Science with the space-based interferometer LISA. V: Extreme mass-ratio inspirals

Babak, S., Gair, J., Sesana, A., Barausse, E., Sopuerta, C. F., Berry, C. P. L., et al. (2017). Science with the space-based interferometer LISA. V: Extreme mass-ratio inspirals. Physical Review D, 95: 103012. doi:10.1103/PhysRevD.95.103012.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-46DA-F Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002E-094D-4
Genre: Journal Article

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 Creators:
Babak, Stanislav1, Author              
Gair, Jonathan, Author
Sesana, Alberto2, Author              
Barausse, Enrico, Author
Sopuerta, Carlos F., Author
Berry, Christopher P. L., Author
Berti, Emanuele, Author
Amaro-Seoane, Pau1, Author              
Petiteau, Antoine, Author
Klein, Antoine, Author
Affiliations:
1Astrophysical and Cosmological Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, escidoc:1933290              
2Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, escidoc:24013              

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Free keywords: General Relativity and Quantum Cosmology, gr-qc,Astrophysics, Cosmology and Extragalactic Astrophysics, astro-ph.CO, Astrophysics, Galaxy Astrophysics, astro-ph.GA
 Abstract: The space-based Laser Interferometer Space Antenna (LISA) will be able to observe the gravitational-wave signals from systems comprised of a massive black hole and a stellar-mass compact object. These systems are known as extreme-mass-ratio inspirals (EMRIs) and are expected to complete $\sim 10^4-10^5$ cycles in band, thus allowing exquisite measurements of their parameters. In this work, we attempt to quantify the astrophysical uncertainties affecting the predictions for the number of EMRIs detectable by LISA, and find that competing astrophysical assumptions produce a variance of about three orders of magnitude in the expected intrinsic EMRI rate. However, we find that irrespective of the astrophysical model, at least a few EMRIs per year should be detectable by the LISA mission, with up to a few thousands per year under the most optimistic astrophysical assumptions. We also investigate the precision with which LISA will be able to extract the parameters of these sources. We find that typical fractional statistical errors with which the intrinsic parameters (redshifted masses, massive black hole spin and orbital eccentricity) can be recovered are $\sim 10^{-6}$--$10^{-4}$. Luminosity distance (which is required to infer true masses) is inferred to about $10\%$ precision and sky position is localized to a few square degrees, while tests of the multipolar structure of the Kerr metric can be performed to percent-level precision or better.

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 Dates: 2017-03-282017
 Publication Status: Published in print
 Pages: revtex4-1, 13 figures, 22 pages
 Publishing info: -
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 Identifiers: arXiv: 1703.09722
URI: http://arxiv.org/abs/1703.09722
DOI: 10.1103/PhysRevD.95.103012
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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: 95 Sequence Number: 103012 Start / End Page: - Identifier: ISSN: 0556-2821
CoNE: http://pubman.mpdl.mpg.de/cone/journals/resource/111088197762258