J/A+A/674/A117ivo://CDS.VizieR/J/A+A/674/A117doi:10.26093/cds/vizier.36740117CDSGeorgieva I.Y.Persson C.M.Goffo E.Acuna L.Aguichine A.,Serrano L.M.Lam K.W.F.Gandolfi D.Collins K.A.Howell S.B.Dai F.,Fridlund M.Korth J.Deleuil M.Barragan O.Cochran W.D.Csizmadia S.,Deeg H.J.Guenther E.Hatzes A.P.Jenkins J.M.Livingston J.Luque R.,Mousis O.Osborne H.L.M.Palle E.Redfield S.Van Eylen V.,Twicken J.D.Winn J.N.Alqasim A.Collins K.I.Gnilka C.L.Latham D.W.,Lewis H.M.Relles H.M.Ricker G.R.Rowden P.Seager S.Shporer A.,Tan T.-G.Vanderburg A.Vanderspek R.2024-11-06T20:04:22Z2023-06-13T07:59:28ZCDS support team

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

cds-question@unistra.frmultiple-starsexoplanetsradial-velocityvisible-astronomyWe report the discovery of a hot (Teq~1055K) planet in the small-planet radius valley that transits the Sun-like star TOI-733. It was discovered as part of the KESPRINT follow-up program of TESS planets carried out with the HARPS spectrograph. TESS photometry from sectors 9 and 36 yields an orbital period of Porb=4.884765^+1.9e-5^_-2.4e-5_ days and a radius of Rp=1.992^+0.085^_-0.090_R_{Earth}_. Multi-dimensional Gaussian process modelling of the radial velocity measurements from HARPS and activity indicators gives a semi-amplitude of K=2.23+/-0.26m/s, translating into a planet mass of Mp=5.72^+0.70^+_-0.68_M_{Earth}_. These parameters imply that the planet is of moderate density ({rho}_p_=3.98^+0.77^_-0.66_g/cm^3^) and place it in the transition region between rocky and volatile-rich planets with H/He-dominated envelopes on the mass-radius diagram. Combining these with stellar parameters and abundances, we calculated planet interior and atmosphere models, which in turn suggest that TOI-733 b has a volatile-enriched, most likely secondary outer envelope, and may represent a highly irradiated ocean world. This is one of only a few such planets around G-type stars that are well characterised.2023A&A...674A.117Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/674/A117CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/674/A117https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/674/A117http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/674/A117https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/674/A117https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/674/A117http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/674/A117GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/674/A117/tablea1TOI-733 radial velocities and spectral activity indicators measured from 3.6m/HARPS spectrarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeBarycentric Julian date (TDB)dtime.epochdoubleRV-DRSDRS radial velocitykm/sphys.veloc;pos.heliocentricdoublee_RV-DRSDRS radial velocity errorkm/sstat.errordoubledlWDifferential line widthkm**2.s**-2spect.line.widthdoublee_dlWDifferential line width errorkm**2.s**-2stat.errordoubleCRXChromatic index (in m/s/Np)m/sspect.indexdoublee_CRXChromatic index error (in m/s/Np)m/sstat.errordoubleHalphaH{alpha} indexspect.indexdoubleBISBisector spankm/sphys.velocdoubleFWHMFWHM of the CCFkm/sphys.angSizedoubleS-indexS-indexspect.indexdoublee_S-indexS-index errorstat.errordoubleSNR550nmSignal-to-noise ratio a 550nmstat.snrfloatExpTimeExposure timestime.duration;obs.exposureint