J/AJ/162/167ivo://CDS.VizieR/J/AJ/162/167doi:10.26093/cds/vizier.51620167CDSFukui A.Korth J.Livingston J.H.Twicken J.D.Osorio M.R.Z.,Jenkins J.M.Mori M.Murgas F.Ogihara M.Narita N.Palle E.,Stassun K.G.Nowak G.Ciardi D.R.Alvarez-hernandez L.Bejar V.J.S.,Casasayas-barris N.Crouzet N.De Leon J.P.Esparza-borges E.,Soto D.H.Isogai K.Kawauchi K.Klagyivik P.Kodama T.Kurita S.,Kusakabe N.Luque R.Madrigal-aguado A.Rodriguez P.M.Morello G.,Nishiumi T.Orell-miquel J.Oshagh M.Parviainen H.,Sanchez-benavente M.Stangret M.Terada Y.Watanabe N.Chen G.,Tamura M.Bosch-cabot P.Bowen M.Eastridge K.Freour L.Gonzales E.,Guerra P.Jundiyeh Y.Kim T.K.Kroer L.V.Levine A.M.Morgan E.H.,Reefe M.Tronsgaard R.Wedderkopp C.K.Wittrock J.Collins K.A.,Hesse K.Latham D.W.Ricker G.R.Seager S.Vanderspek R.Winn J.,Bachelet E.Bowman M.Mccully C.Daily M.Harbeck D.Volgenau N.H.2022-03-16T11:43:00Z2022-01-07T08:30:49ZCDS support team

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

cds-question@unistra.frexoplanetsm-starsdwarf-starsWe report the discovery of one super-Earth- (TOI-1749b) and two sub-Neptune-sized planets (TOI-1749c and TOI-1749d) transiting an early M dwarf at a distance of 100pc, which were first identified as planetary candidates using data from the TESS photometric survey. We have followed up this system from the ground by means of multiband transit photometry, adaptive optics imaging, and low-resolution spectroscopy, from which we have validated the planetary nature of the candidates. We find that TOI-1749b, c, and d have orbital periods of 2.39, 4.49, and 9.05days, and radii of 1.4, 2.1, and 2.5R{Earth}, respectively. We also place 95% confidence upper limits on the masses of 57, 14, and 15M{Earth} for TOI-1749b, c, and d, respectively, from transit timing variations. The periods, sizes, and tentative masses of these planets are in line with a scenario in which all three planets initially had a hydrogen envelope on top of a rocky core, and only the envelope of the innermost planet has been stripped away by photoevaporation and/or core-powered mass-loss mechanisms. These planets are similar to other planetary trios found around M dwarfs, such as TOI-175b,c,d and TOI-270b,c,d, in the sense that the outer pair has a period ratio within 1% of 2. Such a characteristic orbital configuration, in which an additional planet is located interior to a near 2:1 period-ratio pair, is relatively rare around FGK dwarfs.2021AJ....162..167Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/162/167CatalogResearchIsServedByTAP VizieR generic servicerelated-toVII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)IV/38 : TESS Input Catalog - v8.0 (TIC-8) (Stassun+, 2019)J/ApJ/736/19 : Kepler planetary candidates. II. (Borucki+, 2011)J/ApJS/197/8 : Kepler candidate multiple transiting planets (Lissauer+, 2011)J/ApJ/790/146 : Planets in Kepler's multi-transiting systems (Fabrycky+, 2014)J/ApJ/791/54 : Nearby M Dwarfs parameters (Gaidos+, 2014)J/ApJ/804/64 : Empirical and model parameters of 183 M dwarfs (Mann+, 2015)J/AJ/152/180 : Bolometric fluxes eclipsing binaries Tycho-2 (Stassun+, 2016)J/ApJ/822/86 : False positive probabilities Q1-Q17 DR24 KOIs (Morton+, 2016)J/A+A/600/A30 : Limb-darkening for TESS satellite (Claret, 2017)J/AJ/153/71 : Kepler follow-up obs. program. I. Imaging (Furlan+, 2017)J/AJ/153/136 : Planets & their host stars with Gaia plxs (Stassun+, 2017)J/ApJ/834/17 : Mass & radius of planets, moons, low mass stars (Chen+, 2017)J/ApJS/230/16 : 5 through L3 empirical stellar spectra SDSS (Kesseli+, 2017)J/AJ/156/271 : The stellar membership of the Taurus SFR (Luhman, 2018)J/A+A/629/A111 : L 98-59 (TOI 175) HARPS observations (Cloutier+, 2019)J/ApJ/871/63 : How to constrain your Mdwarf II. Nearby binaries (Mann+, 2019)J/A+A/642/A115 : CARMENES input catalogue of M dwarfs. V. (Cifuentes+, 2020)J/A+A/649/A26 : TOI-178 six transiting planets (Leleu+, 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/162/167https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/162/167http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/162/167https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/162/167https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/162/167http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/162/167GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/AJ/162/167/table5Mid times of individual transitsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEpoch[0/102] Epoch sequence numbertime.epochintTDB[2458685/2459144] Mid-transit time, Barycentric Julian Date at TDBdtime.epochdoubleE_TDB[0.001/0.09] Upper errordstat.error;stat.maxfloate_TDB[0.001/0.08] Lower errordstat.errorfloatInstInstrumentmeta.id;instrcharPlanetTOI-1749 Planet; c or dmeta.id;meta.mainchar