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• W2019159794 abstract "As a black hole and neutron star approach during inspiral, the field lines of a magnetized neutron star eventually thread the black hole event horizon and a short-lived electromagnetic circuit is established. The black hole acts as a battery that provides power to the circuit, thereby lighting up the pair just before merger. Although originally suggested as an electromagnetic counterpart to gravitational-wave detection, a black hole battery is of more general interest as a novel luminous astrophysical source. To aid in the theoretical understanding, we present analytic solutions for the electromagnetic fields of a magnetic dipole in the presence of an event horizon. In the limit that the neutron star is very close to a Schwarzschild horizon, the Rindler limit, we can solve Maxwell's equations exactly for a magnetic dipole on an arbitrary worldline. We present these solutions here and investigate a proxy for a small segment of the neutron star orbit around a big black hole. We find that the voltage the black hole battery can provide is in the range $ensuremath{sim}{10}^{16}$ statvolts with a projected luminosity of ${10}^{42}text{ }text{ }mathrm{ergs}/mathrm{s}$ for an $M=10{M}_{ensuremath{bigodot}}$ black hole, a neutron star with a B-field of ${10}^{12}text{ }text{ }mathrm{G}$, and an orbital velocity $ensuremath{sim}0.5c$ at a distance of $3M$ from the horizon. Larger black holes provide less power for binary separations at a fixed number of gravitational radii. The black hole/neutron star system therefore has a significant power supply to light up various elements in the circuit possibly powering bursts, jets, beamed radiation, or even a hot spot on the neutron star crust." @default.
• W2019159794 created "2016-06-24" @default.
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• W2019159794 date "2013-09-30" @default.
• W2019159794 modified "2023-10-17" @default.
• W2019159794 title "Big black hole, little neutron star: Magnetic dipole fields in the Rindler spacetime" @default.
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• W2019159794 doi "https://doi.org/10.1103/physrevd.88.064059" @default.
• W2019159794 hasPublicationYear "2013" @default.
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