Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The HARPS search for southern extra-solar planets. XVII. Super-Earth and
  Neptune-mass planets in multiple planet systems HD47186 and HD181433   This paper reports on the detection of two new multiple planet systems around
solar-like stars HD47186 and HD181433. The first system includes a hot Neptune
of 22.78 M_Earth at 4.08-days period and a Saturn of 0.35 M_Jup at 3.7-years
period. The second system includes a Super-Earth of 7.5 M_Earth at 9.4-days
period, a 0.64 M$_Jup at 2.6-years period as well as a third companion of 0.54
M_Jup with a period of about 6 years. These detections increase to 20 the
number of close-in low-mass exoplanets (below 0.1 M_Jup) and strengthen the
fact that 80% of these planets are in a multiple planetary systems.

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The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
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The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: hep-th
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The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
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The categories of this paper are: acc-phys
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The categories of this paper are: q-bio
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The categories of this paper are: patt-sol
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The categories of this paper are: nucl-th
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The categories of this paper are: eess
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The categories of this paper are: supr-con
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The categories of this paper are: funct-an