Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The TROY project: Searching for co-orbital bodies to known planets. I.
  Project goals and first results from archival radial velocity   The detection of Earth-like planets, exocomets or Kuiper belts show that the
different components found in the solar system should also be present in other
planetary systems. Trojans are one of these components and can be considered
fossils of the first stages in the life of planetary systems. Their detection
in extrasolar systems would open a new scientific window to investigate
formation and migration processes. In this context, the main goal of the TROY
project is to detect exotrojans for the first time and to measure their
occurrence rate (eta-Trojan). In this first paper, we describe the goals and
methodology of the project. Additionally, we used archival radial velocity data
of 46 planetary systems to place upper limits on the mass of possible trojans
and investigate the presence of co-orbital planets down to several tens of
Earth masses. We used archival radial velocity data of 46 close-in (P<5 days)
transiting planets (without detected companions) with information from
high-precision radial velocity instruments. We took advantage of the time of
mid-transit and secondary eclipses (when available) to constrain the possible
presence of additional objects co-orbiting the star along with the planet.
This, together with a good phase coverage, breaks the degeneracy between a
trojan planet signature and signals coming from additional planets or
underestimated eccentricity. We identify nine systems for which the archival
data provide 1-sigma evidence for a mass imbalance between L4 and L5. Two of
these systems provide 2-sigma detection, but no significant detection is found
among our sample. We also report upper limits to the masses at L4/L5 in all
studied systems and discuss the results in the context of previous findings.

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The categories of this paper are: hep-ex
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The categories of this paper are: q-fin
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The categories of this paper are: cond-mat
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The categories of this paper are: chem-ph
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The categories of this paper are: funct-an
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The categories of this paper are: eess
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The categories of this paper are: nucl-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: patt-sol
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The categories of this paper are: atom-ph
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The categories of this paper are: econ
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The categories of this paper are: dg-ga
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The categories of this paper are: stat
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The categories of this paper are: comp-gas
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The categories of this paper are: cs
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The categories of this paper are: hep-lat