Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Looking for Super-Earths in the HD 189733 System: A Search for Transits
  in Most Space-Based Photometry   We have made a comprehensive transit search for exoplanets down to ~1.5 - 2
Earth radii in the HD 189733 system, based on 21-days of nearly uninterrupted
broadband optical photometry obtained with the MOST (Microvariability &
Oscillations of STars) satellite in 2006. We have searched these data for
realistic limb-darkened transits from exoplanets other than the known hot
Jupiter, HD 189733b, with periods ranging from about 0.4 days to one week.
Monte Carlo statistical tests of the data with synthetic transits inserted into
the data-set allow us to rule out additional close-in exoplanets with sizes
ranging from about 0.15 - 0.31 RJ (Jupiter radii), or 1.7 - 3.5 RE (Earth
radii) on orbits whose planes are near that of HD 189733b. These null results
constrain theories that invoke lower-mass hot Super-Earth and hot Neptune
planets in orbits similar to HD 189733b due to the inward migration of this hot
Jupiter. This work also illustrates the feasibility of discovering smaller
transiting planets around chromospherically active stars.

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The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ
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The categories of this paper are: patt-sol
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The categories of this paper are: adap-org
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The categories of this paper are: mtrl-th
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The categories of this paper are: hep-ex