Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Atmospheric Circulation of Eccentric Hot Jupiter HAT-P-2b   The hot-Jupiter HAT-P-2b has become a prime target for Spitzer Space
Telescope observations aimed at understanding the atmospheric response of
exoplanets on highly eccentric orbits. Here we present a suite of
three-dimensional atmospheric circulation models for HAT-P-2b that investigate
the effects of assumed atmospheric composition and rotation rate on global
scale winds and thermal patterns. We compare and contrast atmospheric models
for HAT-P-2b, which assume one and five times solar metallicity, both with and
without TiO/VO as atmospheric constituents. Additionally we compare models that
assume a rotation period of half, one, and two times the nominal
pseudo-synchronous rotation period. We find that changes in assumed atmospheric
metallicity and rotation rate do not significantly affect model predictions of
the planetary flux as a function of orbital phase. However, models in which
TiO/VO are present in the atmosphere develop a transient temperature inversion
between the transit and secondary eclipse events that results in significant
variations in the timing and magnitude of the peak of the planetary flux
compared with models in which TiO/VO are omitted from the opacity tables. We
find that no one single atmospheric model can reproduce the recently observed
full orbit phase curves at 3.6, 4.5 and 8.0 microns, which is likely due to a
chemical process not captured by our current atmospheric models for HAT-P-2b.
Further modeling and observational efforts focused on understanding the
chemistry of HAT-P-2b's atmosphere are needed and could provide key insights
into the interplay between radiative, dynamical, and chemical processes in a
wide range of exoplanet atmospheres.

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The categories of this paper are: patt-sol
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The categories of this paper are: ao-sci
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The categories of this paper are: funct-an
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The categories of this paper are: comp-gas
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The categories of this paper are: bayes-an
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The categories of this paper are: alg-geom
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The categories of this paper are: solv-int
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The categories of this paper are: nlin
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The categories of this paper are: adap-org
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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: q-fin
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The categories of this paper are: q-alg
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The categories of this paper are: stat
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The categories of this paper are: quant-ph
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The categories of this paper are: nucl-th