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dc.contributor.authorBayliss, Daniel D. R.
dc.contributor.authorWinn, Joshua Nathan
dc.contributor.authorMardling, Rosemary A.
dc.contributor.authorSackett, Penny D.
dc.date.accessioned2011-04-07T20:20:32Z
dc.date.available2011-04-07T20:20:32Z
dc.date.issued2010-10
dc.date.submitted2010-08
dc.identifier.issn2041-8205
dc.identifier.issn2041-8213
dc.identifier.urihttp://hdl.handle.net/1721.1/62163
dc.description.abstractWe present high-precision radial velocity observations of WASP-17 throughout the transit of its close-in giant planet, using the MIKE spectrograph on the 6.5 m Magellan Telescope at Las Campanas Observatory. By modeling the Rossiter-McLaughlin effect, we find the sky-projected spin-orbit angle to be [lambda] = 167.4 ± 11.2 deg. This independently confirms the previous finding that WASP-17b is on a retrograde orbit, suggesting it underwent migration via a mechanism other than just the gravitational interaction between the planet and the disk. Interestingly, our result for [lambda] differs by 45 ± 13 deg from the previously announced value, and we also find that the spectroscopic transit occurs 15 ± 5 minutes earlier than expected, based on the published ephemeris. The discrepancy in the ephemeris highlights the need for contemporaneous spectroscopic and photometric transit observations whenever possible.en_US
dc.description.sponsorshipUnited States. National Aeronautics and Space Administration (Origins program, award NNX09AD36G)en_US
dc.description.sponsorshipMassachusetts Institute of Technology (Class of 1942)en_US
dc.language.isoen_US
dc.publisherInstitute of Physicsen_US
dc.relation.isversionofhttp://dx.doi.org/10.1088/2041-8205/722/2/l224en_US
dc.rightsCreative Commons Attribution-Noncommercial-Share Alike 3.0en_US
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/3.0/en_US
dc.sourceProf. Winn via Mat Willmotten_US
dc.titleConfirmation of a Retrograde Orbit for Exoplanet Wasp-17ben_US
dc.typeArticleen_US
dc.identifier.citationBayliss, Daniel D. R. et al. "Confirmation of a Retrograde Orbit for Exoplanet Wasp-17b." 2010 ApJ 722.2 L224-L227en_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Physicsen_US
dc.contributor.departmentMIT Kavli Institute for Astrophysics and Space Researchen_US
dc.contributor.approverWinn, Joshua Nathan
dc.contributor.mitauthorWinn, Joshua Nathan
dc.relation.journalAstrophysical Journal Lettersen_US
dc.eprint.versionAuthor's final manuscripten_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dspace.orderedauthorsBayliss, Daniel D. R.; Winn, Joshua N.; Mardling, Rosemary A.; Sackett, Penny D.en
dc.identifier.orcidhttps://orcid.org/0000-0002-4265-047X
mit.licenseOPEN_ACCESS_POLICYen_US
mit.metadata.statusComplete


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