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dc.contributor.authorWinn, Joshua Nathan
dc.contributor.authorJohnson, John Asher
dc.contributor.authorFabrycky, Daniel C.
dc.contributor.authorHoward, Andrew W.
dc.contributor.authorMarcy, Geoffrey W.
dc.contributor.authorNarita, Norio
dc.contributor.authorCrossfield, Ian J.
dc.contributor.authorSuto, Yasushi
dc.contributor.authorTurner, Edwin L.
dc.contributor.authorEsquerdo, G. A.
dc.contributor.authorHolman, Matthew J.
dc.date.accessioned2013-02-06T16:34:04Z
dc.date.available2013-02-06T16:34:04Z
dc.date.issued2009-07
dc.date.submitted2009-02
dc.identifier.issn0004-637X
dc.identifier.issn1538-4357
dc.identifier.urihttp://hdl.handle.net/1721.1/76747
dc.description.abstractWe present photometric and spectroscopic observations of the 2009 February 2 transit of the exoplanet XO-3b. The new data show that the planetary orbital axis and stellar rotation axis are misaligned, as reported earlier by Hébrard and coworkers. We find the angle between the sky projections of the two axes to be 37.3 ± 3.7 deg, as compared to the previously reported value of 70 ± 15 deg. The significance of this discrepancy is unclear because there are indications of systematic effects. XO-3b is the first exoplanet known to have a highly inclined orbit relative to the equatorial plane of its parent star, and as such it may fulfill the predictions of some scenarios for the migration of massive planets into close-in orbits. We revisit the statistical analysis of spin-orbit alignment in hot-Jupiter systems. Assuming the stellar obliquities to be drawn from a single Rayleigh distribution, we find the mode of the distribution to be 13[superscript +5] [subscript –2] deg. However, it remains the case that a model representing two different migration channels—in which some planets are drawn from a perfectly aligned distribution and the rest are drawn from an isotropic distribution—is favored over a single Rayleigh distribution.en_US
dc.description.sponsorshipUnited States. National Aeronautics and Space Administration (Origins Award NNX09AD36G)en_US
dc.description.sponsorshipUnited States. National Aeronautics and Space Administration (Origins Award NNX09AB33G)en_US
dc.language.isoen_US
dc.publisherIOP Publishingen_US
dc.relation.isversionofhttp://dx.doi.org/10.1088/0004-637x/700/1/302en_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.sourcearXiven_US
dc.titleOn the Spin-Orbit Misalignment of the XO-3 Exoplanetary Systemen_US
dc.typeArticleen_US
dc.identifier.citationWinn, Joshua N. et al. “On the Spin-Orbit Misalignment of the XO-3 Exoplanetary System.” The Astrophysical Journal 700.1 (2009): 302–308.en_US
dc.contributor.departmentKavli Institute for Astrophysics and Space Researchen_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Physicsen_US
dc.contributor.mitauthorWinn, Joshua Nathan
dc.relation.journalAstrophysical Journalen_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.orderedauthorsWinn, Joshua N.; Johnson, John Asher; Fabrycky, Daniel; Howard, Andrew W.; Marcy, Geoffrey W.; Narita, Norio; Crossfield, Ian J.; Suto, Yasushi; Turner, Edwin L.; Esquerdo, Gil; Holman, Matthew J.en
dc.identifier.orcidhttps://orcid.org/0000-0002-4265-047X
mit.licenseOPEN_ACCESS_POLICYen_US


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