J/A+A/687/A226ivo://CDS.VizieR/J/A+A/687/A226doi:10.26093/cds/vizier.36870226CDSMontalto M.Greco N.Biazzo K.Desidera S.Andreuzzi G.Bieryla A.,Bignamini A.Bonomo A.S.Briceno C.Cabona L.Cosentino R.,Damasso M.Fiorenzano A.Fong W.Goeke B.Hesse K.M.Kostov V.B.,Lanza A.F.Latham D.W.Law N.Mancini L.Maggio A.Molinaro M.,Mann A.W.Mantovan G.Naponiello L.Nardiello D.Nascimbeni V.,Pagano I.Pedani M.Safonov B.S.Scandariato G.Seager S.Singh V.,Sozzetti A.Strakhov I.A.Winn J.N.Ziegler C.Zingales T.2024-11-21T20:02:08Z2024-07-16T07:19:19ZCDS support team

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

cds-question@unistra.frmultiple-starsexoplanetsphotometryvisible-astronomyspectroscopyWe report the confirmation of a new transiting exoplanet orbiting the star TOI-5076. We present our vetting procedure and follow-up observations which led to the confirmation of the exoplanet TOI-5076b. In particular, we employed high-precision TESS photometry, high-angular-resolution imaging from several telescopes, and high-precision radial velocities from HARPS-N. From the HARPS-N spectroscopy, we determined the spectroscopic parameters of the host star: Teff=(5070+/-143)K, logg=(4.6+/-0.3), [Fe/H]=(+0.20+/-0.08), and [alpha/Fe]=0.05+/-0.06. The transiting planet is a warm sub-Neptune with a mass mp=(16+/-2)M_{Earth}_, a radius rp=(3.2+/-0.l)R_{Earth}_ yielding a density {rho}p=(2.8+/-0.5)g/cm^3^. It revolves around its star approximately every 23.445 days. The host star is a metal-rich, K2V dwarf, located at about 82 pc from the Sun with a radius of R*=(0.78+/-0.01)R_{sun}_ and a mass of M*=(0.80+/-0.07)M_{sun}_. It forms a common proper motion pair with an M-dwarf companion star located at a projected separation of 2178au. The chemical analysis of the host-star and the Galactic-space velocities indicate that TOI-5076 belongs to the old population of thin-to-thick-disk transition stars. The density of TOI-5076b suggests the presence of a large fraction by volume of volatiles overlying a massive core. We found that a circular orbit solution is marginally favored with respect to an eccentric orbit solution for TOI-5076b.2024A&A...687A.226Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/687/A226CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/687/A226https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/687/A226http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/687/A226https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/687/A226https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/687/A226http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/687/A226GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/687/A226/table2Photometric data obtained from the analysis of TESS satellite imagesFluxNormalized fluxphot.flux;arith.ratiodoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeBarycentric Julian date (BJD) in Barycentric Dynamical Time (TDB) at mid exposuredtime.epochdoublee_FluxError on normalized fluxstat.error;phot.fluxdoubleJ/A+A/687/A226/table3Spectroscopic data obtained from the analysis of HARPS-N spectrarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeBarycentric Julian date (BJD) at mid exposuredtime.epochdoubleRVRadial velocitykm/sphys.veloc;pos.heliocentricdoublee_RVError on radial velocitykm/sstat.errorfloatbisBisector spankm/sphys.velocdoubleccfCross-correlation function FWHMkm/sspect.line.widthfloatlogRhkActivity index log R'HKphot.flux;arith.ratiofloate_logRhkError on activity index log R'HKstat.errorfloat