The Spin-Orbit Alignment of the HD 17156 Transiting Eccentric Planetary System

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dc.contributor.utaustinauthorCochran, William D.en_US
dc.contributor.utaustinauthorRedfield, Sethen_US
dc.contributor.utaustinauthorEndl, Michaelen_US
dc.contributor.utaustinauthorCochran, Anita L.en_US
dc.creatorCochran, William D.en_US
dc.creatorRedfield, Sethen_US
dc.creatorEndl, Michaelen_US
dc.creatorCochran, Anita L.en_US
dc.date.accessioned2016-10-28T19:36:19Z
dc.date.available2016-10-28T19:36:19Z
dc.date.issued2008-08en_US
dc.description.abstractWe present high- precision radial velocity observations of HD 17156 during a transit of its eccentric Jovian planet. In these data, we detect the Rossiter- McLaughlin effect, which is an apparent perturbation in the velocity of the star due to the progressive occultation of part of the rotating stellar photosphere by the transiting planet. This system had previously been reported by Narita et al. in 2008 to exhibit a lambda = 62 degrees +/- 25 degrees misalignment of the projected planetary orbital axis and the stellar rotation axis. We model our data, along with the Narita et al. data, and obtain for the combined data set. We thus conclude that the planetary orbital axis is lambda = 9.4 degrees +/- 9.3 degrees for the combined data set. We thus conclude that the planetary orbital axis is actually very well aligned with the stellar rotation axis.en_US
dc.description.departmentMcDonald Observatoryen_US
dc.description.sponsorshipNASA HST-HF-01190.01, NNG05G107en_US
dc.description.sponsorshipTPF Foundation Science Program and under Cooperative Agreement NNA06CA98Aen_US
dc.identifierdoi:10.15781/T2Z60C47J
dc.identifier.citationCochran, William D., Seth Redfield, Michael Endl, and Anita L. Cochran. "The Spin-Orbit Alignment of the HD 17156 Transiting Eccentric Planetary SystemBased 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. This Letter includes data taken at the McDonald Observatory of the University of Texas at Austin." The Astrophysical Journal Letters, Vol. 683, No. 1 (Aug., 2008): L59.en_US
dc.identifier.doi10.1086/591317en_US
dc.identifier.issn2041-8205en_US
dc.identifier.urihttp://hdl.handle.net/2152/43014
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.subjectplanetary systemsen_US
dc.subjectstars : individual (hd 17156)en_US
dc.subjecthobby-eberly telescopeen_US
dc.subjecthd 17156ben_US
dc.subjectbeta-pictorisen_US
dc.subjectstaren_US
dc.subjectperioden_US
dc.subjectspectrographen_US
dc.subjectcompanionen_US
dc.subjectrotationen_US
dc.subjectvelocityen_US
dc.subjectgasen_US
dc.subjectastronomy & astrophysicsen_US
dc.titleThe Spin-Orbit Alignment of the HD 17156 Transiting Eccentric Planetary Systemen_US
dc.typeArticleen_US

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