J/AJ/161/119ivo://CDS.VizieR/J/AJ/161/119doi:10.26093/cds/vizier.51610119CDSRubenzahl R.A.Dai F.Howard A.W.Chontos A.Giacalone S.Lubin J.,Rosenthal L.J.Isaacson H.Batalha N.M.Crossfield I.J.M.Dressing C.,Fulton B.Huber D.Kane S.R.Petigura E.A.Robertson P.Roy A.,Weiss L.M.Beard C.Hill M.L.Mayo A.Mocnik T.Murphy J.M.A.,Scarsdale N.2025-05-05T20:07:32Z2021-05-05T08:11:39ZCDS support team

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

cds-question@unistra.frsurveysexoplanetsg-starsradial-velocityvisible-astronomyWe measured the Rossiter-McLaughlin effect of WASP-107b during a single transit with Keck/HIRES. We found the sky-projected inclination of WASP-107b's orbit, relative to its host star's rotation axis, to be |{lambda}|=118_-19_^+38^degrees. This confirms the misaligned/polar orbit that was previously suggested from spot-crossing events and adds WASP-107b to the growing population of hot Neptunes in polar orbits around cool stars. WASP-107b is also the fourth such planet to have a known distant planetary companion. We examined several dynamical pathways by which this companion could have induced such an obliquity in WASP-107b. We find that nodal precession and disk dispersal-driven tilting can both explain the current orbital geometry while Kozai-Lidov cycles are suppressed by general relativity. While each hypothesis requires a mutual inclination between the two planets, nodal precession requires a much larger angle, which for WASP-107 is on the threshold of detectability with future Gaia astrometric data. As nodal precession has no stellar type dependence, but disk dispersal-driven tilting does, distinguishing between these two models is best done on the population level. Finding and characterizing more extrasolar systems like WASP-107 will additionally help distinguish whether the distribution of hot-Neptune obliquities is a dichotomy of aligned and polar orbits or if we are uniformly sampling obliquities during nodal precession cycles.2021AJ....161..119Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/161/119CatalogResearchIsServedByTAP VizieR generic servicerelated-toI/259 : The Tycho-2 Catalogue (Hog+, 2000)J/ApJS/159/141 : Spectroscopic properties of cool stars. I. (Valenti+, 2005)J/A+A/517/L1 : Radial velocities of WASP-8b planet (Queloz+, 2010)J/ApJ/723/L223 : Radial velocities of HAT-P-11 (Winn+, 2010)J/ApJS/225/32 : Extended abundance analysis of cool stars (Brewer+, 2016)J/ApJ/832/183 : Binary stellar evolution for Kepler systems (Kostov+, 2016)J/ApJ/836/77 : Library of high-S/N optical spectra of FGKM stars (Yee+, 2017)J/AJ/155/255 : Rvel and activity measurements of HAT-P-11 (Yee+, 2018)J/AJ/159/241 : TESS-Keck Survey I. HD332231 Radial Velocities (Dalba+, 2020)J/A+A/640/A73 : pi Men radial velocity curves (De Rosa+, 2020)J/AJ/160/259 : HPF RVs and TESS photometry of TOI-1266 (Stefansson+, 2020)J/AJ/161/70 : RVel for WASP-170 with HIRES & CORALIE (Piaulet+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/161/119https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/161/119http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/161/119https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/161/119https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/161/119http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/161/119GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/AJ/161/119/table1Radial velocities of WASP-107recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJD[2458905/2458907] Barycentric Julian Date; TDBdtime.epochdoubleRVel[-5.52/6.43] Barycentric radial velocitym/sphys.veloc;pos.heliocentricfloate_RVel[1.2/1.7] Uncertainty in RVm/sstat.error;phys.velocfloatTexp[727/900] Exposure time in secondsstime.duration;obs.exposureint