A Spitzer/IRS Legacy Reference Spectrum for Exoplanet HD 189733b

Details A Spitzer/IRS Legacy Reference Spectrum for Exoplanet HD 189733b A Spitzer/IRS Legacy Reference Spectrum for Exoplanet HD 189733b

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007sptz.prop40504g&link_type=abstract

Spitzer Proposal ID #40504

Physics

Scientific paper

We propose to obtain high quality IRS spectra of HD 189733b, the nearest, brightest, and highest contrast transiting extrasolar planet known. Motivated by a fundamental disagreement between published models and Short-Low 7.5 - 14.7 micron spectra of HD 189733b and HD 209458b taken in Cycle 3, we propose to (1) extend wavelength coverage to 5.2 to 38 microns, and (2) increase the signal-to-noise ratio over that of existing spectra by a factor of three. The detection of spectral features, water absorption, or the degree of departure from blackbody behavior would allow us to discriminate among possible solutions to the current problem, and to put significant constraints on future models of hot Jovian atmospheres.

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