Analysis of HD 149026b Spitzer Data Using a New Intrapixel Technique

Details Analysis of HD 149026b Spitzer Data Using a New Intrapixel Technique Analysis of HD 149026b Spitzer Data Using a New Intrapixel Technique

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010dps....42.2713s&link_type=abstract

American Astronomical Society, DPS meeting #42, #27.13; Bulletin of the American Astronomical Society, Vol. 42, p.1062

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Scientific paper

The Saturn-sized exoplanet HD 149026b transits a large, relatively hot parent star at a distance of only 0.042 AU. The planet's high average density suggests that most of HD 149026b's mass must be in it's large, icy/rocky core. Using the Spitzer Space Telescope to observe the system during secondary eclipse, previous authors report contradicting eclipse depths at 8.0 μm. We re-analyze these data, combine the results with two new observations at 8.0 μm, and use additional observations in other Spitzer channels to present constraints on the atmospheric composition of HD 149026b. We also present a new technique that models Spitzer's position-dependent (intrapixel) sensitivity effect to a high degree of precision. Spitzer is operated by the Jet Propulsion Laboratory, California Institute of Technology under a contract with NASA, which provided support for this work.

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