J/ApJ/703/L99ivo://CDS.VizieR/J/ApJ/703/L99doi:10.26093/cds/vizier.17039099CDSWinn J.N.Johnson J.A.Albrecht S.Howard A.W.Marcy G.W.,Crossfield I.J.Holman M.J.2017-07-11T13:08:27Z2011-11-21T12:42:46ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frradial-velocitymultiple-starssolar-system-planetsWe show that the exoplanet HAT-P-7b has an extremely tilted orbit, with a true angle of at least 86{deg} with respect to its parent star's equatorial plane, and a strong possibility of retrograde motion. We also report evidence for an additional planet or companion star. The evidence for the unparalleled orbit and the third body is based on precise observations of the star's apparent radial velocity (RV). The anomalous RV due to rotation (the Rossiter-McLaughlin effect) was found to be a blueshift during the first half of the transit and a redshift during the second half, an inversion of the usual pattern, implying that the angle between the sky-projected orbital and stellar angular momentum vectors is 182.5{deg}+/-9.4{deg}. The third body is implicated by excess RV variation of the host star over 2yr. Some possible explanations for the tilted orbit of HAT-P-7b are a close encounter with another planet, the Kozai effect, and resonant capture by an inward-migrating outer planet.2009ApJ...703L..99Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/703/L99CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/527/L11 : HAT-P-6 radial velocity curve (Hebrard+, 2011)J/ApJ/693/794 : Transit of exoplanet HD 17156b (Winn+, 2009)J/ApJ/675/1531 : Transits of super-Neptune HD 149026b (Winn+, 2008)J/ApJ/683/1076 : Transits of exoplanet XO-3b (Winn+, 2008)J/AJ/134/1707 : Six transits of exoplanet HAT-P-1b (Winn+, 2007)J/ApJ/657/1098 : Transit of TrES-1 (Winn+, 2007)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/703/L99https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/703/L99http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/703/L99https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/703/L99https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/703/L99http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/703/L99GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/ApJ/703/L99/table1Relative radial velocity measurements of HAT-P-7recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian Datedtime.epochdoubleRVRadial velocity (1)m/sphys.veloc;pos.heliocentricfloate_RVError in RV (2)m/sstat.errorfloatInst[1/2] Spectrograph identification: 1=Keck/HIRES; 2=Subaru/HDS.meta.id;meta.mainint