Ground-based detections of sodium in HD 209458b's atmosphere in two data sets

Details Ground-based detections of sodium in HD 209458b's atmosphere in two data sets Ground-based detections of sodium in HD 209458b's atmosphere in two data sets

Feb 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009iaus..253..520a&link_type=abstract

Transiting Planets, Proceedings of the International Astronomical Union, IAU Symposium, Volume 253, p. 520-523

Astronomy and Astrophysics

Astronomy

Scientific paper

We present two separate ground-based detections of sodium in the transmission spectrum of HD 209458b. First we reanalyzed an archival data set from the HDS spectrograph on Subaru, which shows sodium at a >5σ level. Secondly, our preliminary results of a UVES/VLT data set indicate sodium absorption at a similar level, although the data cover the eclipse only partially. Both results are fully consistent with the HST results of Charbonneau et al. (2002). The Na D absorption feature seems to be resolved in the narrowest passband.

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