Multichannel Spitzer Observations of HD 149026b

Details Multichannel Spitzer Observations of HD 149026b Multichannel Spitzer Observations of HD 149026b

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009dps....41.4206h&link_type=abstract

American Astronomical Society, DPS meeting #41, #42.06

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Scientific paper

HD 149026b is a Saturn-sized, transiting exoplanet that orbits a metal-rich star. Its 80 M⊕ of heavy elements exceed the solar system's entire complement, making it one of the most exotic worlds yet detected. We present secondary eclipses of HD 149026b observed with the Spitzer Space Telescope at 3.6, 4.5, 5.8, 8, and 16 μm. Taken under the Spitzer Exoplanet Target of Opportunity program and other programs, these data provide constraints on the planet's emission spectrum and temperature. As a small planet orbiting a relatively large and bright star, HD 149026b is a challenging target. We will discuss a variety of observing methods (including preflash and preburn) and Spitzer systematic models used to recover the planetary signal. A companion talk by Hardy et al. will provide constraints on the eccentricity and argument of periapsis due to the precise phase of secondary eclipse. 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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