J/AJ/159/44ivo://CDS.VizieR/J/AJ/159/44doi:10.26093/cds/vizier.51590044CDSCrouzet N.Healy B.F.Hebrard G.McCullough P.R.Long D.Montanes-Rodriguez P.Ribas I.Vilardell F.Herrero E.Garcia-Melendo E.,Conjat M.Foote J.Garlitz J.Vo P.Santos N.C.de Bruijne J.,Osborn H.P.Dalal S.Nielsen L.D.2020-10-07T13:03:41Z2020-04-15T12:57:47ZCDS support team

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

cds-question@unistra.frradial-velocityg-starsexoplanetsvisible-astronomyTransiting planets orbiting bright stars are the most favorable targets for follow-up and characterization. We report the discovery of the transiting hot Jupiter XO-7b and of a second, massive companion on a wide orbit around a circumpolar, bright, and metal-rich G0 dwarf (V=10.52, T_eff_=6250{+/-}100K, [Fe/H]=0.432{+/-}0.057dex). We conducted photometric and radial velocity follow-up with a team of amateur and professional astronomers. XO-7b has a period of 2.8641424{+/-}0.0000043days, a mass of 0.709{+/-}0.034M_J_, a radius of 1.373{+/-}0.026R_J_, a density of 0.340{+/-}0.027g/cm^3^, and an equilibrium temperature of 1743{+/-}23K. Its large atmospheric scale height and the brightness of the host star make it well suited to atmospheric characterization. The wide-orbit companion is detected as a linear trend in radial velocities with an amplitude of ~100m/s over two years, yielding a minimum mass of 4M_J_; it could be a planet, a brown dwarf, or a low-mass star. The hot Jupiter orbital parameters and the presence of the wide-orbit companion point toward a high-eccentricity migration for the hot Jupiter. Overall, this system will be valuable to understand the atmospheric properties and migration mechanisms of hot Jupiters and will help constrain the formation and evolution models of gas giant exoplanets.2020AJ....159...44Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/159/44CatalogResearchIsServedByTAP VizieR generic servicerelated-toI/259 : The Tycho-2 Catalogue (Hog+, 2000)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+, 2003)III/231 : The Tycho-2 Spectral Type Catalog (Wright+, 2003)II/328 : AllWISE Data Release (Cutri+, 2013)I/347 : Distances to 1.33 billion stars in Gaia DR2 (Bailer-Jones+, 2018)I/345 : Gaia DR2 (Gaia Collaboration, 2018)VI/135 : All-sky spectrally matched Tycho2 stars (Pickles+, 2010)J/ApJ/622/1102 : The planet-metallicity correlation. (Fischer+, 2005)J/A+A/487/373 : Spectroscopic parameters of 451 HARPS-GTO stars (Sousa+, 2008)J/A+A/505/853 : HD16760 radial velocity curve (Bouchy+, 2009)J/ApJ/707/446 : HAT-P-13 photometry follow-up (Bakos+, 2009)J/A+A/513/A69 : HD9446 radial velocity curve (Hebrard+, 2010)J/A+A/523/A88 : A Jupiter-mass companion around HD 109246 (Boisse+, 2010)J/other/A+ARV/18.67 : Accurate masses and radii of normal stars (Torres+, 2010)J/A+A/538/A113 : Extrasolar planets Radial velocities of 8 stars (Diaz+ 2012)J/A+A/545/A55 : Extrasolar planets Radial velocities 5 stars (Boisse+, 2012)J/ApJ/757/18 : Radial velocities 16 hot Jupiter host stars (Albrecht+, 2012)J/A+A/556/A150 : SWEETCat I. Stellar parameters for host stars (Santos+, 2013)J/A+A/563/A22 : Radial velocities of 3 new hot Jupiters (Moutou+, 2014)J/ApJ/785/126 : HIRES radial velocity measurements (Knutson+, 2014)J/ApJ/809/77 : Transiting Exoplanet Survey Satellite (TESS) (Sullivan+, 2015)J/A+A/585/A46 : Extrasolar planets Radial velocities 5 stars (Bouchy+, 2016)J/A+A/588/A145 : Radial velocities 8 stars with giant planets (Hebrard+, 2016)J/A+A/591/A55 : Five transiting Jupiters discovered using WASP (Maxted+, 2016)J/A+A/600/A30 : Limb-darkening for TESS satellite (Claret, 2017)J/A+A/601/A9 : HD17674, HD29021, and HD42012 radial velocities (Rey+, 2017)J/A+A/618/A103 : Gl617A and Gl96 radial velocity curves (Hobson+, 2018)J/AJ/156/216 : Differential photometry & RVs of HATS-59 (Sarkis+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/159/44https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/159/44http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/159/44https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/159/44https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/159/44http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/159/44GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/AJ/159/44/table5Radial velocity measurements of the host star XO-7 obtained with the SOPHIE spectrographrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJD[57593/58304] Reduced Barycentric Julian Date; BJD-2400000time.epochdoublePhase[0.05/0.95] Orbital phase (1)time.phasedoubleRV[-13.2/-12.8] Radial velocitykm/sphys.veloc;pos.heliocentricfloate_RV[0.008/0.03] Error on RV ({sigma})km/sstat.errorfloat