The Mid-infrared Spectrum of HD 209458b

Details The Mid-infrared Spectrum of HD 209458b The Mid-infrared Spectrum of HD 209458b

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...21010203s&link_type=abstract

American Astronomical Society Meeting 210, #102.03; Bulletin of the American Astronomical Society, Vol. 39, p.229

Astronomy and Astrophysics

Astronomy

1

Scientific paper

Using archive data taken with the Spitzer/IRS instrument, we have determined the spectrum of HD 209458b between 8.25 and 13.5 microns with an average SNR of 4 in each 0.25 micron spectral channel. We have used two independent methods, one differential and one absolute, to determine the planet spectrum and find the results are in good agreement. In the mid-infrared, the planet emission is consistent with a featureless spectrum. The absence of strong spectral features is significant in part because the expected water vapor absorption feature is not detected. This work required development of improved methods for Spitzer/IRS data calibration that increase the achievable dynamic range for observations of bright point sources.

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