Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Caustic Structures and Detectability of Circumbinary Planets in
  Microlensing   Recent discoveries of circumbinary planets in Kepler data show that there is
a viable channel of planet formation around binary main sequence stars.
Motivated by these discoveries, we have investigated the caustic structures and
detectability of circumbinary planets in microlensing events. We have produced
a suite of animations of caustics as a function of the projected separation and
angle of the binary host to efficiently explore caustic structures over the
entire circumbinary parameter space. Aided by these animations, we have derived
a semi-empirical analytic expression for the location of planetary caustics,
which are displaced in circumbinary lenses relative to those of planets with a
single host. We have used this expression to show that the dominant source of
caustic motion will be due to the planet's orbital motion and not that of the
binary star. Finally, we estimate the fraction of circumbinary microlensing
events that are recognizable as such to be significant (5-50 percent) for
binary projected separations in the range 0.1-0.5 in units of Einstein radii.

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The categories of this paper are: adap-org
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The categories of this paper are: ao-sci
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The categories of this paper are: q-alg
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The categories of this paper are: atom-ph
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The categories of this paper are: eess
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The categories of this paper are: alg-geom
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The categories of this paper are: nucl-ex
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The categories of this paper are: mtrl-th
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The categories of this paper are: math-ph
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The categories of this paper are: hep-th
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The categories of this paper are: cond-mat
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-ph
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The categories of this paper are: nlin
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The categories of this paper are: patt-sol
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The categories of this paper are: gr-qc