Title

THERMAL EMISSION OF WASP-14b REVEALED WITH THREE SPITZER ECLIPSES

Authors

Authors

J. Blecic; J. Harrington; N. Madhusudhan; K. B. Stevenson; R. A. Hardy; P. E. Cubillos; M. Hardin; C. J. Campo; W. C. Bowman; S. Nymeyer; T. J. Loredo; D. R. Anderson;P. F. L. Maxted

Comments

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Abbreviated Journal Title

Astrophys. J.

Keywords

eclipses; planets and satellites: atmospheres; planets and satellites:; individual (WASP-14b); techniques: photometric; COLLISION-INDUCED ABSORPTION; INFRARED ARRAY CAMERA; 8 MU-M; ECCENTRIC; ORBIT; TEMPERATURE INVERSION; SPACE-TELESCOPE; GIANT PLANETS; LIGHT; CURVES; HD 147506B; EXOPLANET ATMOSPHERES; Astronomy & Astrophysics

Abstract

Exoplanet WASP-14b is a highly irradiated, transiting hot Jupiter. Joshi et al. calculate an equilibrium temperature (T-eq) of 1866 K for zero albedo and reemission from the entire planet, a mass of 7.3 +/- 0.5 Jupiter masses (M-J), and a radius of 1.28 +/- 0.08 Jupiter radii (R-J). Its mean density of 4.6 g cm(-3) is one of the highest known for planets with periods less than three days. We obtained three secondary eclipse light curves with the Spitzer Space Telescope. The eclipse depths from the best jointly fit model are 0.224% +/- 0.018% at 4.5 mu m and 0.181% +/- 0.022% at 8.0 mu m. The corresponding brightness temperatures are 2212 +/- 94 K and 1590 +/- 116 K. A slight ambiguity between systematic models suggests a conservative 3.6 mu m eclipse depth of 0.19% +/- 0.01% and brightness temperature of 2242 +/- 55 K. Although extremely irradiated, WASP-14b does not show any distinct evidence of a thermal inversion. In addition, the present data nominally favor models with day-night energy redistribution less than similar to 30%. The current data are generally consistent with oxygen-rich as well as carbon-rich compositions, although an oxygen-rich composition provides a marginally better fit. We confirm a significant eccentricity of e = 0.087 +/- 0.002 and refine other orbital parameters.

Journal Title

Astrophysical Journal

Volume

779

Issue/Number

1

Publication Date

1-1-2013

Document Type

Article

Language

English

First Page

16

WOS Identifier

WOS:000328160100005

ISSN

0004-637X

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