The first detection of the thermal emission from a solid exoplanet

Details The first detection of the thermal emission from a solid exoplanet The first detection of the thermal emission from a solid exoplanet

Jul 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011sptz.prop80231g&link_type=abstract

Spitzer Proposal ID #80231

Computer Science

Scientific paper

We propose to use Spitzer to perform the historical first detection of the emission from a solid extrasolar planet. Our team has recently detected with Spitzer the transit of the planet 55 Cnc e, the first `super-Earth' transiting a nearby solar-type star, and thus amenable for a thorough characterization. Our measured radius, confirmed afterwards by MOST transit photometry, favors a solid planet composed or rock and volatiles. Its closest counterparts in our solar system are the rock+ice cores of Neptune and Uranus, but the value of this comparison is certainly limited. Measuring the brightness temperature of 55 Cnc e will allow us to constrain its heat distribution efficiency, bulk and atmospheric compositions, and thus to improve our understanding of its mysterious nature.

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