Extreme-Mass-Ratio Bursts from the Galactic Centre

Berry, C. P.L. and Gair, J. R. (2013) Extreme-Mass-Ratio Bursts from the Galactic Centre. In: 9th International LISA Symposium (LISA 2012), Paris, France, 21-25 May 2012, pp. 185-189. ISBN 9781583818169

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Publisher's URL: http://www.aspbooks.org/a/volumes/article_details/?paper_id=35133


An extreme-mass-ratio burst (EMRB) is a gravitational wave signal emitted when a compact object passes through periapsis on a highly eccentric orbit about a much more massive body, in our case a stellar mass object about the 4.31×106 M☉ massive black hole (MBH) in the Galactic Centre. We investigate how EMRBs could constrain the parameters of the Galaxy's MBH. EMRBs should be detectable if the periapsis is rp < 65rg for a μ = 10M☉ orbiting object, where rg = GM•/c2 is the gravitational radius. The signal-to-noise ratio ρ scales like log(ρ) = -2.7 log(rp/rg) + log(μ/M☉) + 4.9. For periapses smaller than ∼ 10rg, EMRBs can be informative, providing good constraints on both the MBH's mass and spin.

Item Type:Conference Proceedings
Glasgow Author(s) Enlighten ID:Gair, Dr Jonathan and Berry, Dr Christopher
Authors: Berry, C. P.L., and Gair, J. R.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Astronomical Society of the Pacific Conference Series

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