Atmospheric composition and thermal structure of super-Earth GJ~1214b

Details Atmospheric composition and thermal structure of super-Earth GJ~1214b Atmospheric composition and thermal structure of super-Earth GJ~1214b

Jun 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010sptz.prop70148n&link_type=abstract

Spitzer Proposal ID #70148

Physics

Scientific paper

We propose to characterize the day-side atmospheric chemistry and temperature structure of the super-Earth GJ1214b. Our S/N noise estimates indicate that the dayside atmosphere of this planet is detectable with the two IRAC channels in Warm Spitzer. Based on observations at secondary eclipse in the 3.6 micron and 4.5 micron IRAC channels, we can constrain the atmospheric concentrations of methane and carbon dioxide remarkably well, apart from obtaining constraints on the presence of a thermal inversion (a ``stratosphere') in the atmosphere. Furthermore, the scientific impact of a non-detection in either of the two Warm Spitzer channels would be just as substantial as the detections, if not more. Specifically, our models show that observations in the two channels can distinguish between an atmosphere with equilibrium chemistry and one without. Similarly, we can also distinguish between an atmosphere with a thermal inversion and one without.

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