Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Mergers of Charged Black Holes: Gravitational Wave Events, Short
  Gamma-Ray Bursts, and Fast Radio Bursts   The discoveries of GW 150914, GW 151226, and LVT 151012 suggest that double
black hole (BH-BH) mergers are common in the universe. If at least one of the
two merging black holes carries certain amount of charge, possibly retained by
a rotating magnetosphere, the inspiral of a BH-BH system would drive a global
magnetic dipole normal to the orbital plane. The rapidly evolving magnetic
moment during the merging process would drive a Poynting flux with an
increasing wind power. The magnetospheric activities during the final phase of
the merger would make a fast radio burst (FRB) if the BH charge can be as large
as a factor of $\hat q \sim (10^{-9}-10^{-8})$ of the critical charge $Q_c$ of
the BH. At large radii, dissipation of the Poynting flux energy in the outflow
would power a short duration high-energy transient, which would appear as a
detectable short-duration gamma-ray burst (GRB) if the charge can be as large
as $\hat q \sim (10^{-5}-10^{-4})$. The putative short GRB coincident with GW
150914 recorded by Fermi GBM may be interpreted with this model. Future joint
GW/GRB/FRB searches would lead to a measurement or place a constraint on the
charges carried by isolate black holes.

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The categories of this paper are: chem-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: plasm-ph
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The categories of this paper are: stat
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The categories of this paper are: supr-con
2
The categories of this paper are: math
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The categories of this paper are: alg-geom
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The categories of this paper are: solv-int
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The categories of this paper are: patt-sol
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The categories of this paper are: q-alg
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The categories of this paper are: comp-gas
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The categories of this paper are: funct-an
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-lat
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The categories of this paper are: hep-ph
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The categories of this paper are: acc-phys