The Atmosphere of WASP-14b Revealed by Three Spitzer Eclipses

Details The Atmosphere of WASP-14b Revealed by Three Spitzer Eclipses The Atmosphere of WASP-14b Revealed by Three Spitzer Eclipses

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010dps....42.6205b&link_type=abstract

American Astronomical Society, DPS meeting #42, #62.05; Bulletin of the American Astronomical Society, Vol. 42, p.1090

Astronomy and Astrophysics

Astronomy

Scientific paper

WASP-14b is a hot Jupiter planet (Y. C. Joshy et al. 2009, MNRAS 392, 1532-1538) with mass (7.3 Jupiter masses) and density (4.6 g/cm3) that exceed those of most known extrasolar planets. It is very close to its host star (semimajor axis = 0.036 AU), giving it a typical equilibrium temperature of 1800 K for 0 albedo, circular orbit, and uniform reemission. In addition, its significant orbital eccentricity (0.09) suggests the possibility of a companion planet. All of the above makes this object very interesting for atmospheric study.
Spitzer program 60021 (H. Knutson, PI) obtained a secondary eclipse light curve at 3.6 microns on 2010-03-19 and the Spitzer Exoplanet Target of Opportunity Program (program 50517, J. Harrington, PI) obtained eclipse data at 4.5 and 8.0 microns on 2009-03-18. Analytic light curve models fit the data using a Metropolis-Hastings Markov Chain Monte Carlo (MCMC) algorithm that incorporates corrections for systematic effects. We present estimates of infrared brightness temperatures and constraints on atmospheric composition and thermal structure.
This work is based on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology under a contract with NASA. Support for this work was provided by NASA through an award issued by JPL/Caltech.

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