dc.contributor.author | Bayliss, Daniel D. R. | |
dc.contributor.author | Winn, Joshua Nathan | |
dc.contributor.author | Mardling, Rosemary A. | |
dc.contributor.author | Sackett, Penny D. | |
dc.date.accessioned | 2011-04-07T20:20:32Z | |
dc.date.available | 2011-04-07T20:20:32Z | |
dc.date.issued | 2010-10 | |
dc.date.submitted | 2010-08 | |
dc.identifier.issn | 2041-8205 | |
dc.identifier.issn | 2041-8213 | |
dc.identifier.uri | http://hdl.handle.net/1721.1/62163 | |
dc.description.abstract | We 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.sponsorship | United States. National Aeronautics and Space Administration (Origins program, award NNX09AD36G) | en_US |
dc.description.sponsorship | Massachusetts Institute of Technology (Class of 1942) | en_US |
dc.language.iso | en_US | |
dc.publisher | Institute of Physics | en_US |
dc.relation.isversionof | http://dx.doi.org/10.1088/2041-8205/722/2/l224 | en_US |
dc.rights | Creative Commons Attribution-Noncommercial-Share Alike 3.0 | en_US |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-sa/3.0/ | en_US |
dc.source | Prof. Winn via Mat Willmott | en_US |
dc.title | Confirmation of a Retrograde Orbit for Exoplanet Wasp-17b | en_US |
dc.type | Article | en_US |
dc.identifier.citation | Bayliss, Daniel D. R. et al. "Confirmation of a Retrograde Orbit for Exoplanet Wasp-17b." 2010 ApJ 722.2 L224-L227 | en_US |
dc.contributor.department | Massachusetts Institute of Technology. Department of Physics | en_US |
dc.contributor.department | MIT Kavli Institute for Astrophysics and Space Research | en_US |
dc.contributor.approver | Winn, Joshua Nathan | |
dc.contributor.mitauthor | Winn, Joshua Nathan | |
dc.relation.journal | Astrophysical Journal Letters | en_US |
dc.eprint.version | Author's final manuscript | en_US |
dc.type.uri | http://purl.org/eprint/type/JournalArticle | en_US |
eprint.status | http://purl.org/eprint/status/PeerReviewed | en_US |
dspace.orderedauthors | Bayliss, Daniel D. R.; Winn, Joshua N.; Mardling, Rosemary A.; Sackett, Penny D. | en |
dc.identifier.orcid | https://orcid.org/0000-0002-4265-047X | |
mit.license | OPEN_ACCESS_POLICY | en_US |
mit.metadata.status | Complete | |