Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gravitational Wave Signatures of Superdense Objects in a Nonsingular
  Solution of Gravity Theory   A massive gravitationally bound object with a radius $r \leq 2GM/c^2$, which
occurs in the non-singular version of the nonsymmetric gravitational theory
(NGT), replaces the black hole in Einstein gravity theory. This object is kept
stable by the attractive and repulsive forces generated by NGT, as well as
standard matter pressures, and is called a superdense object (SDO). The
luminosity of gravitational waves emitted by a SDO with a red-shift of order
unity is calculated and it is found that it could be a strong source of
gravitational radiation at low frequencies. The active galactic nucleus of M87
is identified with a SDO and the recent observational results obtained by the
Hubble Space Telesope are used to estimate the amplitude of gravitational
radiation.

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The categories of this paper are: nlin
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The categories of this paper are: q-bio
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The categories of this paper are: stat
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The categories of this paper are: q-fin
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The categories of this paper are: gr-qc
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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-th
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The categories of this paper are: acc-phys
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The categories of this paper are: supr-con
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The categories of this paper are: math
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The categories of this paper are: atom-ph
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The categories of this paper are: econ
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The categories of this paper are: hep-ex
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The categories of this paper are: math-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: quant-ph