Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The O-C diagram of the subdwarf B pulsating star HS2201+2610: detection
  of a giant planet?   In this article we present the O-C diagram of the hot subdwarf B pulsating
star HS2201+2610 after seven years of observations. A secular increase of the
main pulsation period, Pdot=(1.3+-0.1)x10**(-12), is inferred from the data.
Moreover, a further sinusoidal pattern suggests the presence of a low-mass
companion (Msini=~3.5 Mjup), orbiting the hot star at a distance of about 1.7
AU with a period near 1140 days.

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The categories of this paper are: quant-ph
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The categories of this paper are: atom-ph
2
The categories of this paper are: math
7
The categories of this paper are: hep-th
30
The categories of this paper are: q-alg
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The categories of this paper are: alg-geom
3
The categories of this paper are: physics
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The categories of this paper are: comp-gas
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The categories of this paper are: stat
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The categories of this paper are: hep-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: cs
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The categories of this paper are: cond-mat
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The categories of this paper are: hep-ex
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The categories of this paper are: hep-lat
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The categories of this paper are: funct-an