Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An intriguing correlation between the masses and periods of the
  transiting planets   We point out an intriguing relation between the masses of the transiting
planets and their orbital periods. For the six currently known transiting
planets, the data are consistent with a decreasing linear relation. The other
known short-period planets, discovered through radial-velocity techniques, seem
to agree with this relation. We briefly speculate about a tentative physical
model to explain such a dependence.

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The categories of this paper are: plasm-ph
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The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc
3
The categories of this paper are: physics
18
The categories of this paper are: econ
30
The categories of this paper are: q-alg
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The categories of this paper are: comp-gas
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The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
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The categories of this paper are: supr-con
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The categories of this paper are: nlin
17
The categories of this paper are: q-fin