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- W2013038055 abstract "Among the expected sources of gravitational waves for the Laser Interferometer Space Antenna (LISA) is the capture of solar-mass compact stars by massive black holes residing in galactic centers. We construct a simple model for such a capture, in which the compact star moves freely on a circular orbit in the equatorial plane of the massive black hole. We consider the gravitational waves emitted during the late stages of orbital evolution, shortly before the orbiting mass reaches the innermost stable circular orbit. We construct a simple model for the gravitational-wave signal, in which the phasing of the waves plays the dominant role. The signal's behavior depends on a number of parameters, including $ensuremath{mu}$, the mass of the orbiting star, $M$, the mass of the central black hole, and $J$, the black hole's angular momentum. We calculate, using our simplified model, and in the limit of large signal-to-noise ratio, the accuracy with which these quantities can be estimated during a gravitational-wave measurement. For concreteness we consider a typical system consisting of a $10{M}_{ensuremath{bigodot}}$ black hole orbiting a nonrotating black hole of mass ${10}^{6}{M}_{ensuremath{bigodot}}$, whose gravitational waves are monitored during an entire year before the orbiting mass reaches the innermost stable circular orbit. Defining $ensuremath{chi}ensuremath{equiv}frac{mathrm{cJ}}{G{M}^{2}}$ and $ensuremath{eta}ensuremath{equiv}frac{ensuremath{mu}}{M}$, we find $ensuremath{Delta}ensuremath{chi}ensuremath{simeq}5ifmmodetimeselsetexttimesfi{}frac{{10}^{ensuremath{-}2}}{ensuremath{rho}}$, $frac{ensuremath{Delta}ensuremath{eta}}{ensuremath{eta}}ensuremath{simeq}6ifmmodetimeselsetexttimesfi{}frac{{10}^{ensuremath{-}2}}{ensuremath{rho}}$, and $frac{ensuremath{Delta}M}{M}ensuremath{simeq}2ifmmodetimeselsetexttimesfi{}frac{{10}^{ensuremath{-}3}}{ensuremath{rho}}$. Here, $ensuremath{rho}$ denotes the signal-to-noise ratio associated with the signal and its measurement. That these uncertainties are all much smaller than $frac{1}{ensuremath{rho}}$, the signal-to-noise ratio level, is due to the large number of wave cycles received by the detector in the course of one year. These are the main results of this paper. Our simplified model also suggests a method for experimentally testing the strong-field predictions of general relativity." @default.
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- W2013038055 date "1996-11-15" @default.
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- W2013038055 title "Measuring black-hole parameters and testing general relativity using gravitational-wave data from space-based interferometers" @default.
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- W2013038055 doi "https://doi.org/10.1103/physrevd.54.5939" @default.
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