Infrared Spectrocopy of the Transiting Extrasolar Planet HD209458b

Details Infrared Spectrocopy of the Transiting Extrasolar Planet HD209458b Infrared Spectrocopy of the Transiting Extrasolar Planet HD209458b

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20919602r&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #196.02; Bulletin of the American Astronomical Society,

Biology

Scientific paper

We have used the Spitzer Space Telescope to observe the transiting extrasolar planet system HD 209458 at the time of secondary eclipse, when the planet disappears behind the star and later reappears. Using the Infrared Spectrograph (IRS), our technique subtracts the spectrum of the star (when the planet is eclipsed) from the combined light spectrum (when the planet is out of eclipse), to isolate the 7-14 micron spectrum of the planet. This process has required decorrelation of systematic effects, due to detector response drift and telescope pointing jitter. The observations, spanning two secondary eclipse events, have sufficient signal-to-noise to reveal spectral structure. We discuss the implications for the structure and composition of the planet's atmosphere.
This work is based on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology under a contract with NASA. Support for this work was provided by NASA. K.H. acknowledges support from the Summer Undergraduate Internship program of the Goddard Center for Astrobiology. L.J.R. acknowledges support as a NASA Postdoctoral Fellow.

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