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

Published online by Cambridge University Press:  01 May 2008

S. Albrecht ,
I. Snellen ,
E. de Mooij  and
R. Le Poole
S. Albrecht
Affiliation:
Leiden Observatory, University of Leiden, P.O. Box 9513, NL-2300 RA Leiden, The Netherlands email: albrecht@strw.leidenuniv.nl
I. Snellen
Affiliation:
Leiden Observatory, University of Leiden, P.O. Box 9513, NL-2300 RA Leiden, The Netherlands email: albrecht@strw.leidenuniv.nl
E. de Mooij
Affiliation:
Leiden Observatory, University of Leiden, P.O. Box 9513, NL-2300 RA Leiden, The Netherlands email: albrecht@strw.leidenuniv.nl
R. Le Poole
Affiliation:
Leiden Observatory, University of Leiden, P.O. Box 9513, NL-2300 RA Leiden, The Netherlands email: albrecht@strw.leidenuniv.nl
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Abstract

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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.

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Symposium S253: Transiting Planets , May 2008 , pp. 520 - 523
Copyright
Copyright © International Astronomical Union 2009

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