J/AJ/155/255ivo://CDS.VizieR/J/AJ/155/255doi:10.26093/cds/vizier.51550255CDSYee S.W.Petigura E.A.Fulton B.J.Knutson H.A.Batygin K.Bakos G.A.,Hartman J.D.Hirsch L.A.Howard A.W.Isaacson H.Kosiarek M.R.,Sinukoff E.Weiss L.M.2019-01-31T11:49:51Z2019-01-15T08:17:00ZCDS support team

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

cds-question@unistra.freclipsing-binary-starsdwarf-starsk-starsradial-velocityspectroscopyexoplanetsHAT-P-11 is a mid-K dwarf that hosts one of the first Neptune-sized planets found outside the solar system. The orbit of HAT-P-11b is misaligned with the star's spin-one of the few known cases of a misaligned planet orbiting a star less massive than the Sun. We find an additional planet in the system based on a decade of precision radial velocity (RV) measurements from Keck/High Resolution Echelle Spectrometer. HAT-P-11c is similar to Jupiter in its mass (M_P_sin i=1.6+/-0.1 M_J_) and orbital period (P=9.3_-0.5_^+1.0^ year), but has a much more eccentric orbit (e=0.60+/-0.03). In our joint modeling of RV and stellar activity, we found an activity-induced RV signal of ~7 m/s, consistent with other active K dwarfs, but significantly smaller than the 31 m/s reflex motion due to HAT-P-11c. We investigated the dynamical coupling between HAT-P-11b and c as a possible explanation for HAT-P-11b's misaligned orbit, finding that planet-planet Kozai interactions cannot tilt planet b's orbit due to general relativistic precession; however, nodal precession operating on million year timescales is a viable mechanism to explain HAT-P-11b's high obliquity. This leaves open the question of why HAT-P-11c may have such a tilted orbit. At a distance of 38 pc, the HAT-P-11 system offers rich opportunities for further exoplanet characterization through astrometry and direct imaging.2018AJ....155..255Yhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/155/255CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/ApJ/710/1724 : Follow-up photometry for HAT-P-11 (Bakos+, 2010)J/ApJ/723/L223 : Radial velocities of HAT-P-11 (Winn+, 2010)J/ApJ/785/126 : HIRES radial velocity measurements (Knutson+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/155/255https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/155/255http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/155/255https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/155/255https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/155/255http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/155/255GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/AJ/155/255/table1Radial velocity and activity measurementsBJDBarycentric Julian Date; TDBdtime.epochdoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRV[-57.41/22.81] Barycentric radial velocity (1)m/sphys.veloc;pos.barycenterfloate_RV[0.92/2.97] Uncertainty in RV (1)m/sstat.errorfloatSHK[0.454/0.6502] The S_HK_ index (1)spect.indexfloate_SHK[0.0045/0.0065] Uncertainty in SHK (1)stat.errorfloatHaInd[0.04458/0.04668] The H{alpha} index (1)spect.index;em.line.Halphadoublee_HaInd[0.0002/0.00035] Uncertainty in HaInd (1)stat.errordoubleFlag[0/1]? Data flag (2)meta.code.errorintnullable