Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Energy Extraction via Magnetic Reconnection in the Ergosphere of a
  rotating non-Kerr Black Hole   Magnetic reconnection process in the ergosphere is investigated for a
relativistic plasma around a rotating non-Kerr black hole. For a rotating
non-Kerr black hole immersed in magnetic field generated by an externally
material, anti-parallel magnetic field line could form in the ergosphere due to
the frame dragging. Therefore, magnetic reconnection could occur in the
ergosphere. Such magnetic reconnection may generate negative energy at infinity
by redistributing the angular momentum during the process. The results show
that, with the effect of the deformed parameter, extraction of energy from a
rotating non-Kerr black hole by magnetic reconnection could be enhanced in the
presence of a positive deformed parameter.

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The categories of this paper are: chao-dyn
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The categories of this paper are: comp-gas
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The categories of this paper are: gr-qc
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The categories of this paper are: patt-sol
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The categories of this paper are: adap-org
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The categories of this paper are: econ
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The categories of this paper are: alg-geom
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: stat
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The categories of this paper are: physics
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The categories of this paper are: eess
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The categories of this paper are: math
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The categories of this paper are: bayes-an
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The categories of this paper are: nucl-ex
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The categories of this paper are: q-alg