J/A+A/697/A169ivo://CDS.VizieR/J/A+A/697/A169doi:10.26093/cds/vizier.36970169CDSChaturvedi P.Goffo E.Gandolfi D.Persson C.M.Hatzes A.P.Nowak G.,Bonfanti A.Bieryla A.Cochran W.D.Collins K.A.Fajardo-Acosta S.B.,Howell S.B.Jenkins J.M.Korth J.Livingston J.Palle E.Quinn S.N.,Schwarz R.P.Seager S.Shporer A.Stassun K.G.Striegel S.,Van Eylen V.Watkins C.N.Winn J.N.Ziegler C.2025-10-10T20:01:11Z2025-05-19T08:57:23ZCDS support team

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

cds-question@unistra.frmultiple-starsexoplanetsg-starsspectroscopyvisible-astronomyWe report the discovery of TOI-3493 b, a sub-Neptune-sized planet on an 8.15-d orbit transiting the bright (V=9.3) G0 star HD 119355 (aka TIC 203377303) initially identified by NASA's TESS space mission. With the aim of confirming the planetary nature of the transit signal detected by TESS and determining the mass of the planet, we performed an intensive Doppler campaign with the HARPS spectrograph, collecting radial velocity measurements. We found that TOI-3493 b lies in a nearly circular orbit and has a mass of 9.0+/-1.2M_{Earth}_ and a radius of 3.22+/-0.08R_{Earth}_, implying a bulk density of 1.47^+0.23^_-0.22_g/cm^3^, consistent with a composition comprising a small solid core surrounded by a thick H/He-dominated atmosphere.2025A&A...697A.169Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/697/A169CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/697/A169https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/697/A169http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/697/A169https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/697/A169https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/697/A169http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/697/A169GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/697/A169/tableb1HARPS radial velocity measurements and spectroscopic activity indicators for TOI-3493recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian date in the barycentric dynamical time standarddtime.epochdoubleRV-DRSHARPS DRS radial velocitykm/sphys.veloc;pos.heliocentricfloate_RV-DRSHARPS DRS radial velocity errorkm/sstat.errorfloatRV-TERRAHARPS TERRA relative radial velocitykm/sphys.veloc;pos.heliocentricfloate_RV-TERRAHARPS TERRA relative radial velocity errorkm/sstat.errorfloatExpTimeExposure timestime.duration;obs.exposureintSNRSignal-to-noise ratio (at 550nm)stat.snrintBISBisector inverse slope (1)km/sphys.velocfloatFWHMFull-width-at-half-maximum (1)spect.line.widthfloatlogR'HKlogR'_HK_ stellar activity indicatorphot.flux;arith.ratiofloate_logR'HKlogR'_HK_ stellar activity indicator errorstat.errorfloatHalphaH{alpha} stellar activity indicator (1)instr.setup;spect.linefloatNaID1NaID1 stellar activity indicator (1)spect.indexfloatNaID2NaID2 stellar activity indicator (1)spect.indexfloat