Title

The thermal emission of the exoplanet WASP-3b

Authors

Authors

J. W. Rostron; P. J. Wheatley; D. R. Anderson; A. C. Cameron; J. J. Fortney; J. Harrington; H. A. Knutson;D. L. Pollacco

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

Mon. Not. Roy. Astron. Soc.

Keywords

methods: data analysis; planets and satellites: atmospheres; planets and; satellites: individual: WASP-3b; stars: individual: WASP-3; EXTRASOLAR GIANT PLANETS; SECONDARY ECLIPSE PHOTOMETRY; WARM-SPITZER; PHOTOMETRY; HOT-JUPITER; LIGHT CURVES; HD 189733B; THEORETICAL SPECTRA; MU-M; ATMOSPHERES; ORBIT; Astronomy & Astrophysics

Abstract

We report the detection of thermal emission from the transiting hot Jupiter WASP-3b at 3.6, 4.5 and 8.0 mu m using the Spitzer Space Telescope. We obtain planet-to-star flux ratios of 0.209(-0.028)(+0.040), 0.282 +/- 0.012 and 0.328(-0.055)(+0.086) per cent at these wavelengths, respectively, implying infrared brightness temperatures of T-3.6 mu m = 2280(-150)(+210), T-4.5 mu m = 2400 +/- 80 K and T-8.0 mu m = 2210(-250)(+390) K. We find that WASP-3b falls into an emerging class of highly irradiated planets whose measured temperatures suggest that the planets are dark and redistribute heat around the planet inefficiently. The latter is similarly concluded from 1D atmospheric model comparisons, which also favour the presence of an atmospheric temperature inversion. We compare the WASP-3 system to the proposed inversion-activity relation, finding that it hints at a more complex relation than a simple cut-off in activity implied by previous data. Using eclipse timings we also constrain e cos omega to be -0.0006(-0.0006)(+0.0010), suggesting that the eccentricity of WASP-3b can only be large for a narrow range of omega.

Journal Title

Monthly Notices of the Royal Astronomical Society

Volume

441

Issue/Number

4

Publication Date

1-1-2014

Document Type

Article

Language

English

First Page

3666

Last Page

3678

WOS Identifier

WOS:000338764700064

ISSN

0035-8711

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