Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comparison of limb-darkening laws from plane-parallel and
  spherically-symmetric model stellar atmospheres   Limb-darkening is a fundamental constraint for modeling eclipsing binary and
planetary transit light curves. As observations, for example from Kepler,
CoRot, and Most, become more precise then a greater understanding of
limb-darkening is necessary. However, limb-darkening is typically modeled as
simple parameterizations fit to plane-parallel model stellar atmospheres that
ignores stellar atmospheric extension. In this work, I compute linear,
quadratic and four-parameter limb-darkening laws from grids of plane-parallel
and spherically-symmetric model stellar atmospheres in a temperature and
gravity range representing stars evolving on the Red Giant branch. The
limb-darkening relations for each geometry are compared and are found to fit
plane-parallel models much better than the spherically-symmetric models.
Assuming that limb-darkening from spherically-symmetry model atmospheres are
more physically representative of actual stellar limb-darkening than
plane-parallel models then these limb-darkening laws will not fit the limb of a
stellar disk leading to errors in a light curve fit. This error will increase
with a star's atmospheric extension.

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The categories of this paper are: cs
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
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The categories of this paper are: nucl-th
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The categories of this paper are: math-ph
2
The categories of this paper are: math
27
The categories of this paper are: comp-gas
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The categories of this paper are: nucl-ex
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The categories of this paper are: econ
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The categories of this paper are: cond-mat
11
The categories of this paper are: hep-lat
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The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
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The categories of this paper are: stat
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The categories of this paper are: solv-int
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The categories of this paper are: dg-ga