Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Inspiral of a Spinning Black Hole--Magnetized Neutron Star Binary:
  Increasing Charge and Electromagnetic Emission   The mergers of black hole (BH)--neutron star (NS) binaries have been one of
the most interesting topics in astrophysics, because such events have been
thought to possibly produce multimessenger signals including gravitational
waves and broadband electromagnetic (EM) waves. In this paper, we investigate
EM emission from the inspiral of a binary composed of a spinning BH and a
magnetized NS. Observationally, the BH is usually more massive than
$\sim7M_\odot$ and the NS has a mass $\simeq 1.4M_\odot$. During the inspiral
of such a binary, the BH will accumulate more and more charges based on the
charging scenario of Wald, even though the BH will eventually swallow the NS
whole inevitably. We calculate the emission luminosities and energies through
three energy dissipation mechanisms: magnetic dipole radiation, electric dipole
radiation, and magnetic reconnection. We show that magnetic dipole radiation
due to the spin of the increasingly charged BH and magnetic reconnection in
between the BH and the NS could be most significant at the final inspiral
stage. We find that if the BH is rapidly rotating and the NS is strongly
magnetized, these mechanisms would lead to a detectable EM signal (e.g., a
short-duration X-ray transient).

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The categories of this paper are: acc-phys
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The categories of this paper are: hep-lat
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The categories of this paper are: plasm-ph
1
The categories of this paper are: cs
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The categories of this paper are: nucl-th
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The categories of this paper are: patt-sol
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The categories of this paper are: bayes-an
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The categories of this paper are: funct-an
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The categories of this paper are: eess
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The categories of this paper are: alg-geom
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The categories of this paper are: q-bio
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The categories of this paper are: solv-int
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The categories of this paper are: cond-mat
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The categories of this paper are: comp-gas
0
The categories of this paper are: hep-ph
3
The categories of this paper are: physics