J/AJ/165/120ivo://CDS.VizieR/J/AJ/165/120doi:10.26093/cds/vizier.51650120CDSKanodia S.Mahadevan S.Libby-Roberts J.Stefansson G.Canas C.I.,Piette A.A.A.Boss A.Teske J.Chambers J.Zeimann G.Monson A.,Robertson P.Ninan J.P.Lin A.S.J.Bender C.F.Cochran W.D.,Diddams S.A.Gupta A.F.Halverson S.Hawley S.Kobulnicky H.A.,Metcalf A.J.Parker B.A.Powers L.Ramsey L.W.Roy A.Schwab C.,Swaby T.N.Terrien R.C.Wisniewski J.2023-09-27T10:10:46Z2023-07-05T08:33:42ZCDS support team

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

cds-question@unistra.frexoplanetsm-starsinfrared-photometryvisible-astronomyphotometryWe present the discovery of TOI-5205b, a transiting Jovian planet orbiting a solar metallicity M4V star, which was discovered using Transiting Exoplanet Survey Satellite photometry and then confirmed using a combination of precise radial velocities, ground-based photometry, spectra, and speckle imaging. TOI-5205b has one of the highest mass ratios for M-dwarf planets, with a mass ratio of almost 0.3%, as it orbits a host star that is just 0.392{+/-}0.015 M{sun}. Its planetary radius is 1.03{+/-}0.03R_Jup_, while the mass is 1.08{+/-}0.06M_Jup_. Additionally, the large size of the planet orbiting a small star results in a transit depth of ~7%, making it one of the deepest transits of a confirmed exoplanet orbiting a main-sequence star. The large transit depth makes TOI-5205b a compelling target to probe its atmospheric properties, as a means of tracing the potential formation pathways. While there have been radial-velocity-only discoveries of giant planets around mid-M dwarfs, this is the first transiting Jupiter with a mass measurement discovered around such a low-mass host star. The high mass of TOI-5205b stretches conventional theories of planet formation and disk scaling relations that cannot easily recreate the conditions required to form such planets.2023AJ....165..120Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/165/120CatalogResearchIsServedByTAP VizieR generic servicerelated-toIV/38 : TESS Input Catalog - v8.0 (TIC-8) (Stassun+, 2019)VI/121 : Linelist of HCN and HNC (Harris+, 2006)VI/133 : A variationally computed hot NH3 line list - BYTe (Yurchenko+, 2011)J/AJ/106/773 : Mass-luminosity relation (Henry+, 1993)J/A+A/337/403 : Low-mass stars evolutionary models (Baraffe+ 1998)J/ApJ/622/1102 : The planet-metallicity correlation. (Fischer+, 2005)J/ApJ/651/L49 : Upper ScoOB association IRAC observations (Carpenter+, 2006)J/AJ/134/2398 : Stellar SEDs in SDSS and 2MASS filters (Covey+, 2007)J/ApJ/720/1290 : Abundances of stars hosting planets (Ghezzi+, 2010)J/AJ/142/19 : Speckle observations of KOI (Howell+, 2011)J/A+A/533/A141 : Stellar parameters for 582 HARPS FGK stars (Sousa+, 2011)J/ApJS/200/15 : HARPS-TERRA project. I. (Anglada-Escude+, 2012)J/ApJ/771/129 : Submillimetric Class II sources of Taurus (Andrews+, 2013)J/MNRAS/437/1828 : ExoMol line list for HCN and HNC (Barber+, 2014)J/A+A/562/A71 : Chemical abund of solar neighbourhood dwarfs (Bensby+, 2014)J/ApJ/788/59 : Param model circumstellar disks gas mass (Williams+, 2014)J/MNRAS/440/1649 : ExoMol line lists for CH4 (Yurchenko+, 2014)J/AJ/149/166 : Photometry and spectroscopy of HATS-6 (Hartman+, 2015)J/ApJ/804/64 : Empirical and model parameters of 183 M dwarfs (Mann+, 2015)J/ApJ/812/3 : MEarth midtolate Mdwarfs rotation & kinematics (West+, 2015)J/ApJ/828/46 : ALMA survey Lupus protoplanetary disks. I. (Ansdell+, 2016)J/ApJ/827/142 : ALMA observations GKM stars in Upper Sco (Barenfeld+, 2016)J/AJ/152/141 : Solar neighborhood XXXVII. RVs for Mdwarfs (Benedict+, 2016)J/ApJ/831/125 : ALMA 887um obs of ChaI star-forming region (Pascucci+, 2016)J/MNRAS/461/794 : Scorpius-Centaurus K-Type Stars (Pecaut+, 2016)J/ApJ/831/64 : Mass-metallicity relation giant planets (Thorngren+, 2016)J/AJ/153/240 : ALMA survey protoplanetary disks sigma Ori (Ansdell+, 2017)J/A+A/602/A88 : 5 M dwarfs radial velocity curves (Astudillo-Defru+, 2017)J/AJ/153/96 : Std Galactic field RR Lyrae. I. Photometry (Monson+, 2017)J/A+A/603/A30 : Evidence for 2 distinct giant planet pop (Santos+, 2017)J/ApJ/836/77 : Library of high-S/N optical spectra FGKM stars (Yee+, 2017)J/ApJ/856/23 : BANYAN. XI. The BANYAN {Sigma} algorithm (Gagne+, 2018)J/ApJ/860/109 : Keck HIRES obs. of 245 subgiants (Ghezzi+, 2018)J/AJ/156/102 : TESS Input Catalog & Candidate Target List (Stassun+, 2018)J/A+A/609/A117 : CARMENES radial velocity curves 7 M-dwarf (Trifonov+, 2018)J/A+A/623/A72 : Binarity Hipparcos stars from Gaia anomaly (Kervella+, 2019)J/AJ/157/231 : MLSDSS-GaiaDR2 sample of M and L dwarfs (Kiman+, 2019)J/A+A/624/A94 : The role of the host star's metallicity (Maldonado+, 2019)J/ApJ/871/63 : How to constrain your M dwarf II Nearby bin (Mann+, 2019)J/other/Sci/365.1441 : GJ 3512 radial velocity & light curves (Morales+, 2019)J/A+A/625/A68 : Radii and masses of the CARMENES targets (Schweitzer+, 2019)J/ApJ/883/175 : 1st release of MaNGA Stellar Library (MaStar) (Yan+, 2019)J/A+A/642/A115 : CARMENES input catalogue of M dwarfs. V. (Cifuentes+, 2020)J/ApJS/250/29 : Search for nearby Earth analogs. III. RV sets (Feng+, 2020)J/ApJ/899/29 : Radial velocities of TOI-1728 with HPF (Kanodia+, 2020)J/A+A/644/A68 : Abundance signature of M dwarf stars (Maldonado+, 2020)J/AJ/159/100 : Flux & RVs of dwarf G9-40 with K2 & HPF (Stefansson+, 2020)J/A+A/650/A201 : 10 parsec sample in the Gaia era first update (Reyle+, 2021)J/AJ/163/125 : Light curve & RVel of 4 giants planets (Jordan+, 2022)J/AJ/164/81 : Radial velocity & photometric flux TOI-3757 (Kanodia+, 2022)J/ApJS/259/33 : Faint-star TOIs from TESS Primary Mission (Kunimoto+, 2022)J/AJ/163/156 : THYME. VI. TOI-1227 radial velocity (Mann+, 2022)J/A+A/658/A194 : Stellar parameters of 18 M dwarfs (Passegger+, 2022)J/A+A/663/A48 : Two Saturn-mass planets around M dwarfs (Quirrenbach+, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/165/120https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/165/120http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/165/120https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/165/120https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/165/120http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/165/120GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticalInfrareddefaultJ/AJ/165/120/fig3Combined table from original tablesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian Date (at TDB) of observationdtime.epochdoubleFluxRelative fluxphot.flux;arith.ratiodoublee_FluxUncertainty in fluxstat.error;phot.fluxdoubleObsDay of observationtime.epochnullable