Sodium Absorption from the Exoplanetary Atmosphere of HD 189733B Detected in the Optical Transmission Spectrum

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dc.contributor.utaustinauthorRedfield, Sethen_US
dc.contributor.utaustinauthorEndl, Michaelen_US
dc.contributor.utaustinauthorCochran, William D.en_US
dc.contributor.utaustinauthorKoesterke, Larsen_US
dc.creatorRedfield, Sethen_US
dc.creatorEndl, Michaelen_US
dc.creatorCochran, William D.en_US
dc.creatorKoesterke, Larsen_US
dc.date.accessioned2016-10-28T19:36:08Z
dc.date.available2016-10-28T19:36:08Z
dc.date.issued2008-01en_US
dc.description.abstractWe present the first ground-based detection of sodium absorption in the transmission spectrum of an extrasolar planet. Absorption due to the atmosphere of the extrasolar planet HD 189733b is detected in both lines of the Na I doublet. High spectral resolution observations were taken of 11 transits with the High Resolution Spectrograph ( HRS) on the 9.2 m Hobby-Eberly Telescope ( HET). The Na I absorption in the transmission spectrum due to HD 189733b is (-67.2 +/- 20.7) x 10(-5) deeper in the "narrow" spectral band that encompasses both lines relative to adjacent bands. The 1 sigma error includes both random and systematic errors, and the detection is > 3 sigma. This amount of relative absorption in Na I for HD 189733b is similar to 3 times larger than that detected for HD 209458b by Charbonneau et al. ( 2002) and indicates that these two hot Jupiters may have significantly different atmospheric properties.en_US
dc.description.departmentAstronomyen_US
dc.description.sponsorshipHubble Fellowship grant HST-HF-01190.01en_US
dc.description.sponsorshipNASA NAS 5-26555, NN05G107G, NNX07AL70Gen_US
dc.identifierdoi:10.15781/T23X83P11
dc.identifier.citationRedfield, Seth, Michael Endl, William D. Cochran, and Lars Koesterke. "Sodium Absorption from the Exoplanetary Atmosphere of HD 189733b Detected in the Optical Transmission SpectrumBased on observations obtained with the Hobby-Eberly Telescope, which is a joint project of the University of Texas at Austin, the Pennsylvania State University, Stanford University, Ludwig-Maximilians-Universität München, and Georg-August-Universität Göttingen." The Astrophysical Journal Letters, Vol. 673, No. 1 (Jan., 2008): L87.en_US
dc.identifier.doi10.1086/527475en_US
dc.identifier.issnen_US
dc.identifier.urihttp://hdl.handle.net/2152/43005
dc.language.isoEnglishen_US
dc.relation.ispartofen_US
dc.relation.ispartofserialAstrophysical Journal Lettersen_US
dc.rightsAdministrative deposit of works to Texas ScholarWorks: This works author(s) is or was a University faculty member, student or staff member; this article is already available through open access or the publisher allows a PDF version of the article to be freely posted online. The library makes the deposit as a matter of fair use (for scholarly, educational, and research purposes), and to preserve the work and further secure public access to the works of the University.en_US
dc.rights.restrictionOpenen_US
dc.subjectatmospheric effectsen_US
dc.subjectline : profilesen_US
dc.subjectplanetary systems planetsen_US
dc.subjectanden_US
dc.subjectsatellites : individual (hd 189733b)en_US
dc.subjectstars : individual (hd 189733)en_US
dc.subjecttechniques : spectroscopicen_US
dc.subjecttransiting extrasolar planeten_US
dc.subjectlocal interstellar-mediumen_US
dc.subjecthobby-eberlyen_US
dc.subjecttelescopeen_US
dc.subjectca-iien_US
dc.subject209458ben_US
dc.subjectsearchen_US
dc.subjectphotometryen_US
dc.subjecthd-189733en_US
dc.subjectspectroscopyen_US
dc.subjectparametersen_US
dc.subjectastronomy & astrophysicsen_US
dc.titleSodium Absorption from the Exoplanetary Atmosphere of HD 189733B Detected in the Optical Transmission Spectrumen_US
dc.typeArticleen_US

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