Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: General relativistic simulations of binary black hole-neutron stars:
  Precursor electromagnetic signals   We perform the first general relativistic force-free simulations of neutron
star (NS) magnetospheres in orbit about spinning and non-spinning black holes.
We find promising precursor electromagnetic emission: typical Poynting
luminosities at, e.g., an orbital separation of 6.6 times the NS radius are L ~
6 x 10^{42} erg/s for a 1.4 solar-mass NS with a 10^{13}G polar magnetic field.
The Poynting flux peaks within a broad beam of ~40 degrees in the azimuthal
direction and within ~60 degrees from the orbital plane, establishing a
possible lighthouse effect. Our calculations, though preliminary, preview more
detailed simulations of these systems that we plan to perform in the future.

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The categories of this paper are: adap-org
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The categories of this paper are: supr-con
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The categories of this paper are: mtrl-th
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-th
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The categories of this paper are: stat
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The categories of this paper are: math
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The categories of this paper are: q-bio
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The categories of this paper are: physics
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The categories of this paper are: math-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: econ
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The categories of this paper are: solv-int
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The categories of this paper are: chao-dyn
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The categories of this paper are: alg-geom
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The categories of this paper are: patt-sol