J/AJ/163/61ivo://CDS.VizieR/J/AJ/163/61doi:10.26093/cds/vizier.51630061CDSDalba P.A.Kane S.R.Dragomir D.Villanueva S.Collins K.A.,Jacobs T.L.LaCourse D.M.Gagliano R.Kristiansen M.H.Omohundro M.,Schwengeler H.M.Terentev I.A.Vanderburg A.Fulton B.Isaacson H.,Van Zandt J.Howard A.W.Thorngren D.P.Howell S.B.Batalha N.M.,Chontos A.Crossfield I.J.M.Dressing C.D.Huber D.Petigura E.A.,Robertson P.Roy A.Weiss L.M.Behmard A.Beard C.Brinkman C.L.,Giacalone S.Hill M.L.Lubin J.Mayo A.W.Mocnik T.Akana Murphy J.M.,Polanski A.S.Rice M.Rosenthal L.J.Rubenzahl R.A.Scarsdale N.,Turtelboom E.V.Tyler D.Benni P.Boyce P.Esposito T.M.Girardin E.,Laloum D.Lewin P.Mann C.R.Marchis F.Schwarz R.P.Srdoc G.,Steuer J.Sivarani T.Unni A.Eisner N.L.Fetherolf T.Li Z.Yao X.,Pepper J.Ricker G.R.Vanderspek R.Latham D.W.Seager S.Winn J.N.,Jenkins J.M.Burke C.J.Eastman J.D.Lund M.B.Rodriguez D.R.,Rowden P.Ting E.B.Villasenor J.N.2025-05-05T20:07:45Z2022-04-25T06:24:42ZCDS support team

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

cds-question@unistra.frexoplanetsg-starsvisible-astronomyspectroscopyradial-velocityWe report the discovery of TOI-2180b, a 2.8M_J_ giant planet orbiting a slightly evolved G5 host star. This planet transited only once in Cycle 2 of the primary Transiting Exoplanet Survey Satellite (TESS) mission. Citizen scientists identified the 24hr single-transit event shortly after the data were released, allowing a Doppler monitoring campaign with the Automated Planet Finder telescope at Lick Observatory to begin promptly. The radial velocity observations refined the orbital period of TOI-2180b to be 260.8{+/-}0.6days, revealed an orbital eccentricity of 0.368{+/-}0.007, and discovered long-term acceleration from a more distant massive companion. We conducted ground-based photometry from 14 sites spread around the globe in an attempt to detect another transit. Although we did not make a clear transit detection, the nondetections improved the precision of the orbital period. We predict that TESS will likely detect another transit of TOI-2180b in Sector 48 of its extended mission. We use giant planet structure models to retrieve the bulk heavy-element content of TOI-2180b. When considered alongside other giant planets with orbital periods over 100days, we find tentative evidence that the correlation between planet mass and metal enrichment relative to stellar is dependent on orbital properties. Single-transit discoveries like TOI-2180b highlight the exciting potential of the TESS mission to find planets with long orbital periods and low irradiation fluxes despite the selection biases associated with the transit method.2022AJ....163...61Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/163/61CatalogResearchIsServedByTAP VizieR generic servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)IV/38 : TESS Input Catalog - v8.0 (TIC-8) (Stassun+, 2019)J/A+A/529/A75 : Limb-darkening coefficients (Claret+, 2011)J/AJ/142/19 : Speckle observations of KOI (Howell+, 2011)J/A+A/571/A37 : KOI-1257 photometric and velocimetric data (Santerne+, 2014)J/ApJ/805/175 : Keck and APF radial velocities of HD7924 (Fulton+, 2015)J/ApJ/831/64 : Mass-metallicity relation for giant planets (Thorngren+, 2016)J/AJ/154/107 : California-Kepler Survey (CKS). I. 1305 stars (Petigura+, 2017)J/ApJS/235/38 : Kepler planetary cand. VIII. DR25 reliability (Thompson+, 2018)J/AJ/157/218 : Transiting planets near snow line from Kepler (Kawahara+, 2019)J/AJ/158/239 : Metal-rich host stars abund & equivalent widths (Teske+, 2019)J/ApJ/874/L31 : Giant planet bulk & atmosphere metallicities (Thorngren+, 2019)J/AJ/159/241 : TESS-Keck Survey. I. HD332231 Radial Velocities (Dalba+, 2020)J/AJ/161/56 : The TESS-Keck Survey. II. RVs of TOI-561 (Weiss+, 2021)J/AJ/161/119 : The TESS-Keck survey. IV. Rvel for WASP-107 (Rubenzahl+, 2021)J/AJ/162/215 : TESS-Keck survey. V. Rvel of HD63935 (Scarsdale+, 2021)J/AJ/162/265 : TESS-Keck survey. VI. HIP-97166 Rvel (Macdougall+, 2021)J/ApJS/254/39 : Exoplanet candidates from TESS first 2yr obs (Guerrero+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/163/61https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/163/61http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/163/61https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/163/61https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/163/61http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/163/61GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/AJ/163/61/table1Radial velocity measurements of TOI-2180recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJD[2458888/2459427] Barycentric Julian Date at TDBdtime.epochdoubleRVel[-113/96.8] Radial velocitym/sphys.veloc;pos.heliocentricfloate_RVel[1.1/7.5] Uncertainty in RVelm/sstat.error;phys.velocfloatSHK[0.1/0.26] Mount Wilson S_HK_ activity index (1)spect.indexfloate_SHK[0.001/0.002] Uncertainty in SHKstat.errorfloatTelTelescope; Automated Planet Finder or Keckmeta.id;instr.telchar