J/A+A/524/A25ivo://CDS.VizieR/J/A+A/524/A25doi:10.26093/cds/vizier.35240025CDSTriaud A.H.M.J.Collier C.A.Queloz D.Anderson D.R.Gillon M.,Hebb L.Hellier C.Loeillet B.Maxted P.F.Mayor M.Pepe F.,Pollacco D.Segransan D.Smalley B.Udry S.West R.G.Wheatley P.J.2017-12-07T07:27:24Z2010-11-23T07:38:27ZCDS support team

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

cds-question@unistra.frsolar-system-planetsradial-velocityFor transiting planets, the Rossiter-McLaughlin effect allows the measurement of the sky-projected angle beta between the stellar rotation axis and a planet's orbital axis. Using the HARPS spectrograph, we observed the Rossiter-McLaughlin effect for six transiting hot Jupiters found by the WASP consortium. We combine these with long term radial velocity measurements obtained with CORALIE. We found that three of our targets have a projected spin-orbit angle above 90 degrees: WASP-2b: beta=153^+11^_-15_{deg}, WASP-15b: beta=139.6^+5.2^_-4.3_{deg} and WASP-17b: beta=148.5^+5.1^_-4.2_{deg} ; the other three (WASP-4b, WASP-5b and WASP-18b) have angles compatible with 0 degrees. There is no dependence between the misaligned angle and planet mass nor with any other planetary parameter. All orbits are close to circular, with only one firm detection of eccentricity on WASP-18b with e=0.00848^+0.00085^_-0.00095_. No long term radial acceleration was detected for any of the targets. Combining all previous 20 measurements of beta and our six, we attempt to statistically determine the distribution of the real spin-orbit angle psi and find that between about 45 and 85% of hot Jupiters have psi>30{deg}. Observations and predictions using the Kozai mechanism match well. If these observational facts are confirmed in the future, we may then conclude that most hot Jupiters are formed from a dynamical and tidal origin without the necessity to use type I or II migration. At present, standard disc migration cannot explain the observations without invoking at least another additional process.2010A&A...524A..25Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/524/A25CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/508/1509 : Sky maps for hot Jupiters (Heller+, 2009)J/A+A/513/L8 : BD+20 1790 radial velocity curve (Figueira+, 2010)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/524/A25https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/524/A25http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/524/A25https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/524/A25https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/524/A25http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/524/A25GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/524/A25/planets (Orbital parameters (from table3))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/524/A25/planets?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/524/A25/planets?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/524/A25/planets?GETtext/xml+votable180.050000true307.72554176.42954720.0055555555555555566/12424 35210 42936 43847 46421 46437https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/524/A25?format=asciiOpticaldefaultJ/A+A/524/A25/planetsOrbital parameters (from table3)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNamePlanet namemeta.id;meta.maincharprimaryPOrbital perioddtime.perioddoubleaSemi-major axis of orbitAUphys.size.smajAxisfloatMpMass of planet, in Jovian masses(1.898187x10+27kg)phys.massfloatRVcurveRVcurve: Plot the radial velocity curvemeta.ref.urlcharSimbadSimbad column added by the CDSchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/A+A/524/A25/rvdata*The Radial-Velocity data extracted by fitting a Gaussian function on a Cross-Correlation Function resulting from comparing the spectra with a mask corresponding to its spectral typeExpTime of exposurestime.epochinte_RVEstimated 1 sigma error bar on RVkm/sstat.errordoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNamePlanet namemeta.id;meta.maincharInstInstrument used (1)instr.setupcharBJDCalculated Barycentric Julian Date at mid exposure (weighted in time according to flux)dtime.epochdoubleRVEstimated Radial Velocity of the star at Solar system barycentrekm/sspect.dopplerVelocdouble