Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Revisiting the Energy Budget of WASP-43b: Enhanced day-night heat
  transport   The large day--night temperature contrast of WASP-43b has so far eluded
explanation. We revisit the energy budget of this planet by considering the
impact of reflected light on dayside measurements, and the physicality of
implied nightside temperatures. Previous analyses of the infrared eclipses of
WASP-43b have assumed reflected light from the planet is negligible and can be
ignored. We develop a phenomenological eclipse model including reflected light,
thermal emission, and water absorption, and use it to fit published Hubble and
Spitzer eclipse data. We infer a near-infrared geometric albedo of 27$\pm1\%$
and a cooler dayside temperature of $1527 \pm 10~$K. Additionally, we perform
lightcurve inversion on the three published orbital phase curves of WASP-43b
and find that each requires unphysical, negative flux on the nightside. By
requiring non-negative brightnesses at all longitudes, we correct the
unphysical parts of the maps and obtain a much hotter nightside effective
temperature of $1076 \pm 11~$K. The cooler dayside and hotter nightside
suggests a heat recirculation efficiency of $47\%$ for WASP-43b, essentially
the same as for HD 209458b, another hot Jupiter with nearly the same
temperature. Our analysis therefore reaffirms the trend that planets with lower
irradiation temperatures have more efficient day-night heat transport.
Moreover, we note that 1) reflected light may be significant for many near-IR
eclipse measurements of hot Jupiters, and 2) phase curves should be fit with
physically possible longitudinal brightness profiles --- it is insufficient to
only require that the disk-integrated lightcurve be non-negative.

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The categories of this paper are: mtrl-th
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The categories of this paper are: acc-phys
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The categories of this paper are: patt-sol
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-ex
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The categories of this paper are: q-bio
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The categories of this paper are: econ
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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: cmp-lg
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The categories of this paper are: quant-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: atom-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: math-ph