An approximate solution for a general boosted Kerr-Newman black hole is derived from a BMS twisting metric, shown to satisfy Einstein equations up to 1/r^4, with analysis of horizons, ergosphere, and electromagnetic fields for a timelike observer.
Fast radio bursts and their gamma-ray or radio afterglows as Kerr-Newman black hole binaries
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abstract
Fast radio bursts (FRBs) are radio transients lasting only about a few milliseconds. They seem to occur at cosmological distances. We propose that these events can be originated in the collapse of the magnetosphere of Kerr-Newman black holes (KNBHs). We show that the closed orbits of charged particles in the magnetosphere of these objects are unstable. After examining the dependencies on the specific charge of the particle and the spin and charge of the KNBH, we conclude that the resulting timescale and radiation mechanism fit well with the extant observations of FRBs. Furthermore, we argue that the merger of a KNBH binary is one of the plausible central engines for potential gamma-ray or radio afterglow following a certain FRBs, and can also account for gravitational wave (GW) events like GW 150914. Our model leads to predictions that can be tested by combined multi-wavelength electromagnetic and GW observations.
verdicts
UNVERDICTED 2representative citing papers
FRBs serve as cosmological probes via dispersion measure, scattering, and Faraday rotation to constrain baryon distribution, expansion history, magnetic fields, and fundamental physics effects.
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General Boosted Black Holes: A First Approximation
An approximate solution for a general boosted Kerr-Newman black hole is derived from a BMS twisting metric, shown to satisfy Einstein equations up to 1/r^4, with analysis of horizons, ergosphere, and electromagnetic fields for a timelike observer.
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Fast Radio Bursts as Cosmological Probes
FRBs serve as cosmological probes via dispersion measure, scattering, and Faraday rotation to constrain baryon distribution, expansion history, magnetic fields, and fundamental physics effects.