Transit Spectroscopy of the Extrasolar Planet HD 209458b

Details Transit Spectroscopy of the Extrasolar Planet HD 209458b Transit Spectroscopy of the Extrasolar Planet HD 209458b

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aspc..420..321r&link_type=abstract

Bioastronomy 2007: Molecules, Microbes and Extraterrestrial Life ASP Conference Series, Vol. 420, proceedings of a workshop held

Astronomy and Astrophysics

Astronomy

Scientific paper

An attempt to detect water in the atmosphere of the extrasolar planet HD 209458b using transit spectroscopy is presented. A radiative transfer model, designed and built specifically for this project, predicts the dependence in wavelength of the stellar spectrum modulation due to a transiting planet, given a planetary temperature/pressure/composition profile. A total of 352 spectra around 1.8 microns were obtained during three transit events using ISAAC at the Very Large Telescope.
Correlating the modeled modulation with the infrared spectra yields a non-detection of water in the atmosphere of HD 209458b due to overwhelming contamination from telluric water lines. Original data-reduction techniques that were developed during this work are also presented.

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