J/AJ/167/194ivo://CDS.VizieR/J/AJ/167/194doi:10.26093/cds/vizier.51670194CDSDesai A.Turtelboom E.V.Harada C.K.Dressing C.D.Rice D.R.,Murphy J.M.A.Brinkman C.L.Chontos A.Crossfield I.J.M.Dai F.,Hill M.L.Fetherolf T.Giacalone S.Howard A.W.Huber D.Isaacson H.,Kane S.R.Lubin J.MacDougall M.G.Mayo A.W.Mocnik T.Polanski A.S.,Rice M.Robertson P.Rubenzahl R.A.Van Zandt J.Weiss L.M.,Bieryla A.Buchhave L.A.Jenkins J.M.Kostov V.B.Levine A.M.,Lillo-Box J.Paegert M.Rabus M.Seager S.Stassun K.G.Ting E.B.,Watanabe D.Winn J.N.2025-05-05T20:07:56Z2024-06-13T08:10:30ZCDS support team

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

cds-question@unistra.frchemically-peculiar-starsvisible-astronomyspectroscopyradial-velocityWe present and confirm TOI-1751b, a transiting sub-Neptune orbiting a slightly evolved, solar-type, metal-poor star (Teff=5996{+/-}110K, logg=4.2{+/-}0.1, V=9.3mag, [Fe/H]=-0.40{+/-}0.06dex) every 37.47days. We use TESS photometry to measure a planet radius of 2.7}_-0.07_^+0.15^R{earth}. We also use both Keck/HIRES and APF/Levy radial velocities (RV) to derive a planet mass of 14.5_-3.14_^+3.15^M{earth}, and thus a planet density of 3.6{+/-}0.9g/cm^3^. There is also a long-period (~400days) signal that is observed in only the Keck/HIRES data. We conclude that this long-period signal is not planetary in nature and is likely due to the window function of the Keck/HIRES observations. This highlights the role of complementary observations from multiple observatories to identify and exclude aliases in RV data. Finally, we investigate the potential compositions of this planet, including rocky and water-rich solutions, as well as theoretical irradiated ocean models. TOI-1751b is a warm sub-Neptune with an equilibrium temperature of ~820K. As TOI-1751 is a metal-poor star, TOI-1751b may have formed in a water-enriched formation environment. We thus favor a volatile-rich interior composition for this planet.2024AJ....167..194Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/167/194CatalogResearchIsServedByTAP VizieR generic servicerelated-toI/259 : The Tycho-2 Catalogue (Hog+ 2000)VI/120 : High-resolution synthetic stellar library (Coelho+, 2005)VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)J/ApJ/687/1264 : Age estimation for solar-type dwarfs (Mamajek+, 2008)J/other/A+ARV/18.67 : Accurate masses and radii of normal stars (Torres+, 2010)J/AJ/142/19 : Speckle observations of KOI (Howell+, 2011)J/other/Nat/486.375 : Stellar parameters of KOI stars (Buchhave+, 2012)J/A+A/546/A10 : Multiplicity transiting planet-host stars (Lillo-Box+, 2012)J/A+A/566/A103 : Kepler planet host candidates imaging (Lillo-Box+, 2014)J/ApJ/784/45 : Kepler's multiple planet candidates. III. (Rowe+, 2014)J/ApJS/210/25 : Transit timing variation 15 planetary pairs. II. (Xie, 2014)J/AJ/152/180 : Bolometric fluxes eclipsing binaries Tycho-2 (Stassun+, 2016)J/AJ/154/109 : California-Kepler Survey. III. Planet radii (Fulton+, 2017)J/AJ/153/71 : Kepler follow-up obs program. I. Imaging (Furlan+, 2017)J/AJ/154/107 : California-Kepler Survey. I. 1305 stars (Petigura+, 2017)J/AJ/153/136 : Planets & host stars with Gaia parallaxes (Stassun+, 2017)J/ApJ/836/77 : Library of high-S/N optical spectra of FGKM stars (Yee+, 2017)J/AJ/156/264 : California-Kepler Survey. VII. Planet radius (Fulton+, 2018)J/ApJ/856/23 : BANYAN. XI. The BANYAN {Sigma} algorithm (Gagne+, 2018)J/AJ/155/136 : Planets orbiting bright stars K2 campaigns 0-10 (Mayo+, 2018)J/AJ/158/109 : Occurrence rates of planets orbiting FGK stars (Hsu+, 2019)J/ApJS/250/20 : PRot in TESS objects of interest (TOIs) (Canto+, 2020)J/ApJS/254/39 : Exoplanet candidates from TESS first 2yr obs (Guerrero+, 2021)J/AJ/162/75 : Speckle obs TESS exoplanet host stars. II. (Lester+, 2021)J/A+A/660/A102 : Low-mass multi-planetary systems (Acuna+, 2022)J/other/Sci/377.1211 : RV and LC of 8 M dwarf stars with planets (Luque+, 2022)J/ApJS/268/4 : Stellar variab with TESS 2min cadence phot. (Fetherolf+, 2023)J/AJ/166/33 : The TESS-Keck Survey. XV. 108 TESS Planets (MacDougall+, 2023)J/AJ/165/60 : TESS-Keck Survey XIV. 2 exoplanets from DGS (Van Zandt+, 2023)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/167/194https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/167/194http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/167/194https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/167/194https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/167/194http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/167/194GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/AJ/167/194/table4TOI-1751 Radial velocity and S ValuesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJD[1967/3139] Barycentric Julian Date (TBD) of mid-observation, BJD-2457000dtime.epochdoubleRVel[-32.2/135] Radial velocity, (1)m/sspect.dopplerVelocdoublee_RVel[1/34] Uncertainty in RVel (2)m/sstat.error;spect.dopplerVelocdoubleSHK[-0.09/0.32]? Mt. Wilson CaII HK activity indexmeta.code.multipdoublenullablee_SHK[0.001/0.002]? Error in SHKstat.errorfloatnullableTelTelescope/Instrument Used; APF or Keckinstrchar