16 and 24-Micron Photometry of Transiting Extrasolar Planets

Details 16 and 24-Micron Photometry of Transiting Extrasolar Planets 16 and 24-Micron Photometry of Transiting Extrasolar Planets

Jun 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005sptz.prop20605h&link_type=abstract

Spitzer Proposal ID #20605

Computer Science

Scientific paper

We have recently used Spitzer MIPS-24 to detect light from the transiting extrasolar planet HD 209458b during its secondary eclipse. Previously, there had been no direct detection of light from an extrasolar planet. Our calculated brightness temperature constrains models of this planet's thermal emission. We now propose additional eclipse photometry of HD 209458b using the IRS blue peak-up array and MIPS-24 to provide a brightness temperature at 16 microns, reduce the errors on our 24-micron measurement, search for variability due to atmospheric dynamics, investigate the puzzlingly large radius of this planet, and possibly derive the day/night temperature contrast. We also propose eclipse photometry of the second-brightest transiting planet, TrES-1b, in the IRS blue peak-up array, with similar goals. These pioneering measurements of extrasolar planetary fluxes will constrain the many competing radiative, chemical, and dynamical models of these planets' atmospheres.

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