Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A 4.6-year period brown-dwarf companion interacting with the hot-Jupiter
  CoRoT-20 b   We report the discovery of an additional substellar companion in the CoRoT-20
system based on six years of HARPS and SOPHIE radial velocity follow-up.
CoRoT-20 c has a minimum mass of 17 $\pm$ 1 $M_{Jup}$ and it orbits the host
star in 4.59$\pm 0.05$ years, with an orbital eccentricity of 0.60 $\pm$ 0.03.
This is the first identified system with an eccentric hot Jupiter and an
eccentric massive companion. The discovery of the latter might be an indication
of the migration mechanism of the hot Jupiter, via Lidov-Kozai effect. We
explore the parameter space to determine which configurations would trigger
this type of interactions.

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The categories of this paper are: cmp-lg
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The categories of this paper are: ao-sci
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The categories of this paper are: adap-org
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The categories of this paper are: plasm-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: math
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The categories of this paper are: gr-qc
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The categories of this paper are: nucl-th
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The categories of this paper are: q-fin
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The categories of this paper are: supr-con
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The categories of this paper are: hep-lat
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The categories of this paper are: atom-ph
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The categories of this paper are: stat
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The categories of this paper are: cs
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The categories of this paper are: hep-ex
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The categories of this paper are: bayes-an