Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cumulative Shift of Periastron Time of Binary Pulsar with Kozai-Lidov
  Oscillation   We study a hierarchical triple system with the Kozai-Lidov mechanism, and
analyse the cumulative shift of periastron time of a binary pulsar by the
emission of gravitational waves. Time evolution of the osculating orbital
elements of the triple system is calculated by directly integrating the
first-order post-Newtonian equations of motion. The Kozai-Lidov mechanism will
bend the evolution curve of the cumulative shift when the eccentricity becomes
large. We also investigate the parameter range of mass and semi-major axis of
the third companion with which the bending of the cumulative-shift curve could
occur within 100 years.

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The categories of this paper are: chem-ph
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The categories of this paper are: q-bio
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The categories of this paper are: nucl-th
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The categories of this paper are: ao-sci
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The categories of this paper are: econ
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The categories of this paper are: supr-con
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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: atom-ph
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The categories of this paper are: math-ph
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The categories of this paper are: solv-int
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The categories of this paper are: eess
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The categories of this paper are: mtrl-th
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The categories of this paper are: math
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The categories of this paper are: chao-dyn
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The categories of this paper are: dg-ga