HST/COS Observations of the Transit of HD 209458b

Details HST/COS Observations of the Transit of HD 209458b HST/COS Observations of the Transit of HD 209458b

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21546417l&link_type=abstract

American Astronomical Society, AAS Meeting #215, #464.17; Bulletin of the American Astronomical Society, Vol. 42, p.501

Astronomy and Astrophysics

Astronomy

Scientific paper

We report on observations of the transiting planet HD 209458b with the new Cosmic Origins Spectrograph (COS) on HST. The observations were made with the G130M and G160M gratings on COS that cover the 1150--1750 A region with a resolving power of 20,000. We compare the transit spectra with spectra obtained at both quadratures and secondary eclipse to identify spectral features due to the planet's atmosphere and wind. With the greater sensitivity and spectral resolution of COS compared to STIS, we will be able to measure absorption and emission features due to several ions and molecules and infer their locations from measured Doppler shifts. The observations were obtained between September 15 and October 10, 2009.
This work is supported by NASA through a grant to the COS Science Team at the University of Colorado.

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