J/A+A/650/A145ivo://CDS.VizieR/J/A+A/650/A145doi:10.26093/cds/vizier.36500145CDSCointepas M.Almenara J.M.Bonfils X.Bouchy F.Astudillo-Defru N.,Murgas F.Otegi J.F.Wyttenbach A.Anderson D.R.Artigau E.,Canto Martins B.L.Charbonneau D.Collins K.A.Collins K.I.,Correia J-J.Curaba S.Delboulbe A.Delfosse X.Diaz R.F.Dorn C.,Doyon R.Feautrier P.Figueira P.Forveille T.Gaisne G.Gan T.,Gluck L.Helled R.Hellier C.Jocou L.Kern P.Lafrasse S.Law N.,Leao I.C.Lovis C.Magnard Y.Mann A.W.Maurel D.de Medeiros J.R.,Melo C.Moulin T.Pepe F.Rabou P.Rochat S.Rodriguez D.R.Roux A.,Santos N.C.Segransan D.Stadler E.Ting E.B.Twicken J.D.Udry S.,Waalkes W.C.West R.G.Wuensche A.Ziegler C.Ricker G.Vanderspek R.,Latham D.W.Seager S.Winn J.Jenkins J.M.2022-07-06T06:11:08Z2021-06-21T12:33:04ZCDS support team

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

cds-question@unistra.frmultiple-starsexoplanetsspectroscopyWe present the confirmation of a new sub-Neptune close to the transition between Super-Earths and sub-Neptunes transiting the M2 dwarf TOI-269. The exoplanet candidate is identified in multiple TESS sectors and is validated with high-precision spectroscopy from HARPS and ground-based photometric follow-up from ExTrA and LCO-CTIO. We determine mass, radius and bulk density of the exoplanet by jointly modeling both photometry and radial velocities with juliet. The transiting exoplanet has an orbital period of P=3.7 days, a radius of 2.77+/-0.12R_{Earth}_, and a mass of 8.8+/-1.4M_{Earth}_. Since TOI-269 b lies among the best targets of its category for atmospheric characterization, it would be interesting to probe the atmosphere of this exoplanet with transmission spectroscopy in order to compare it to other sub-Neptunes. With an eccentricity e=0.425^+0.082^_-0.086_, TOI-269 b has one of the highest eccentricity among exoplanets with periods less than 10 days. The star being likely a few Gyr old, this system does not appear to be dynamically young. We surmise TOI-269 b may have acquired a high eccentricity as it migrated inward through planet-planet interactions.2021A&A...650A.145Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/650/A145CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/650/A145https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/650/A145http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/650/A145https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/650/A145https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/650/A145http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/650/A145GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/650/A145/table1Photometric fluxes for ExTrA telescope 1FluxNormalized raw flux (flux_raw)phot.flux;arith.ratiodoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDTime of observation in BJD_TDBdtime.epochdoublee_Fluxrms uncertainty on Flux (flux_raw_err)stat.error;phot.fluxdoubleFluxDNormalized detrended flux (flux_detrended)phot.flux;arith.ratiodoublee_FluxDrms uncertainty on FluxD (flux_detrended_err)stat.errordoubleJ/A+A/650/A145/table2Photometric fluxes for ExTrA telescope 2recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDTime of observation in BJD_TDBdtime.epochdoubleFluxNormalized raw flux (flux_raw)phot.flux;arith.ratiodoublee_Fluxrms uncertainty on Flux (flux_raw_err)stat.error;phot.fluxdoubleFluxDNormalized detrended flux (flux_detrended)phot.flux;arith.ratiodoublee_FluxDrms uncertainty on FluxD (flux_detrended_err)stat.errordoubleJ/A+A/650/A145/table3Photometric fluxes for ExTrA telescope 3recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDTime of observation in BJD_TDBdtime.epochdoubleFluxNormalized raw flux (flux_raw)phot.flux;arith.ratiodoublee_Fluxrms uncertainty on Flux (flux_raw_err)stat.error;phot.fluxdoubleFluxDNormalized detrended flux (flux_detrended)phot.flux;arith.ratiodoublee_FluxDrms uncertainty on FluxD (flux_detrended_err)stat.errordouble