J/A+A/668/A158ivo://CDS.VizieR/J/A+A/668/A158doi:10.26093/cds/vizier.36680158CDSMurgas F.Nowak G.Masseron T.Parviainen H.Luque R.Palle E.,Korth J.Carleo I.Csizmadia Sz.Esparza-Borges E.Alqasim A.,Cochran W.D.Dai F.Deeg H.J.Gandolfi D.Goffo E.Kabath P.,Lam K.W.F.Livingston J.Muresan A.Osborne H.L.M.Persson C.M.,Serrano L.M.Smith A.M.S.Van Eylen V.Orell-Miquel J.Hinkel N.R.,Galan D.Puig-Subira M.Stangret M.Fukui A.Kagetani T.Narita N.,Ciardi D.R.Boyle A.W.Ziegler C.Briceno C.Law N.Mann A.W.,Jenkins J.M.Latham D.W.Quinn S.N.Ricker G.Seager S.Shporer A.,Ting E.B.Vanderspek R.Winn J.N.2024-11-06T20:01:37Z2022-12-19T14:33:17ZCDS support team

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

cds-question@unistra.frmultiple-starsexoplanetsradial-velocityvisible-astronomyspectroscopyUltra-short-period (USP) planets are defined as planets with orbital periods shorter than one day. This type of planets is rare, highly irradiated, and interesting because their formation history is unknown. We aim to obtain precise mass and radius measurements to confirm the planetary nature of a USP candidate found by the Transiting Exoplanet Survey Satellite (TESS). These parameters can provide insights into the bulk composition of the planet candidate and help to place constraints on its formation history. We used TESS light curves and HARPS-N spectrograph radial velocity measurements to establish the physical properties of the transiting exoplanet candidate found around the star HD 20329 (TOI-4524). We performed a joint fit of the light curves and radial velocity time series to measure the mass, radius, and orbital parameters of the candidate. We confirm and characterize HD 20329b, an ultra-short-period planet transiting a solar-type star. The host star (HD 20329, V=8.74mag, J=7.5mag) is characterized by its G5 spectral type with M*=0.90+/-0.05M_{sun}_, R*=1.13+/-0.02R_{sun}_, and Teff=5596+/-50K; it is located at a distance d=63.68+/-0.29pc. By jointly fitting the available TESS transit light curves and follow-up radial velocity measurements, we find an orbital period of 0.9261+/-(0.5x10^-4^)days, a planetary radius of Rp=1.72+/-0.07 R_{earth}_, and a mass of Mp=7.42+/-1.09M_{earth}_, implying a mean density of 8.06+/-1.53g/cm^3^. HD 20329b joins the ~30 currently known USP planets with radius and Doppler mass measurements.2022A&A...668A.158Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/668/A158CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/668/A158https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/668/A158http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/668/A158https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/668/A158https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/668/A158http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/668/A158GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/668/A158/tablea1HARPS-N DRS derived valuesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian date (BJD-2457000) TDBdtime.epochdoubleRVRadial velocitym/sphys.veloc;pos.heliocentricdoublee_RVRadial velocity errorm/sstat.errorfloatBISCCF Bisector velocity spanm/sphys.velocfloate_BISCCF Bisector velocity span uncertaintym/sstat.errorfloatFWHMCCF FWHMkm/sspect.line.widthfloatCTRCCF contrast%stat.fit.paramfloatlogRhkLogRhk activity indexphot.flux;arith.ratiofloate_logRhkLogRhk activity index uncertaintystat.errorfloatSNR-550nmSignal-to-noise ratio at 550nmstat.snrfloatTexpExposure timestime.duration;obs.exposurefloatJ/A+A/668/A158/tablea2HARPS-N SERVAL derived valuese_NaD1Na D1 index uncertaintystat.errorfloatNaD2Na D2 indexspect.indexfloate_NaD2Na D2 index uncertaintystat.errorfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian date (BJD 2457000) TBDdtime.epochdoubleRVRadial velocitym/sphys.veloc;pos.heliocentricfloate_RVRadial velocity errorm/sstat.errorfloatCRXChromatic index (in m/s/Np)spect.indexfloate_CRXChromatic index uncertainty(in m/s/Np)stat.errorfloatdLWDifferential line widthm**2.s**-2spect.line.widthfloate_dLWDifferential line width uncertaintym**2.s**-2stat.errorfloatHalphaH{alpha} indexspect.indexfloate_HalphaH{alpha} index uncertaintystat.error;spect.linefloatNaD1Na D1 indexspect.indexfloat