J/A+A/659/A17ivo://CDS.VizieR/J/A+A/659/A17doi:10.26093/cds/vizier.36590017CDSKemmer J.Dreizler S.Kossakowski D.Stock S.Quirrenbach A.,Caballero J.A.Amado P.J.Collins K.A.Espinoza N.Herrero E.,Jenkins J.M.Latham D.W.Lillo-Box J.Narita N.Palle E.Reiners A.,Ribas I.Ricker G.Rodriguez E.Seager S.Vanderspek R.Wells R.,Winn J.Aceituno F.J.Bejar V.J.S.Barclay T.Bluhm P.Chaturvedi P.,Cifuentes C.Collins K.I.Cortes-Contreras M.Demory B.O.,Fausnaugh M.M.Fukui A.Gomez Maqueo Chew Y.Galadi-Enriquez D.Gan T.,Gillon M.Golovin A.Hatzes A.P.Henning T.Huang C.Jeffers S.V.,Kaminski A.Kunimoto M.Kurster M.Lopez-Gonzalez M.J.Lafarga M.,Luque R.McCormac J.Molaverdikhani K.Montes D.Morales J.C.,Passegger V.M.Reffert S.Sabin L.Schoefer P.Schanche N.,Schlecker M.Schroffenegger U.Schwarz R.P.Schweitzer A.Sota A.,Tenenbaum P.Trifonov T.Vanaverbeke S.Zechmeister M.2022-10-12T08:50:22Z2022-03-02T07:12:39ZCDS 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 GJ 3929 b, a hot Earth-sized planet orbiting the nearby M3.5 V dwarf star, GJ 3929 (G 180-18, TOI-2013). Joint modelling of photometric observations from TESS sectors 24 and 25 together with 73 spectroscopic observations from CARMENES and follow-up transit observations from SAINT-EX, LCOGT, and OSN yields a planet radius of R_b_=1.150+/-0.040R_e_, a mass of M_b_=1.21+/-0.42M_e_, and an orbital period of P_b_=2.6162745+/-0.0000030d. The resulting density of rho_b_=4.4+/-1.6g/cm^3^ is compatible with the Earth's mean density of about 5.5g/cm^3^. Due to the apparent brightness of the host star (J=8.7mag) and its small size, GJ 3929 b is a promising target for atmospheric characterisation with the JWST. Additionally, the radial velocity data show evidence for another planet candidate with P_[c]_=14.303+/-0.035d, which is likely unrelated to the stellar rotation period, P_rot_=122+/-13d, which we determined from archival HATNet and ASAS-SN photometry combined with newly obtained TJO data.2022A&A...659A..17Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/659/A17CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/659/A17https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/659/A17http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/659/A17https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/659/A17https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/659/A17http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/659/A17GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/659/A17/tableg1CARMENES RVs and various activity indicators of GJ 3929recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian datedtime.epochdoubleRV? Radial velocitym/sphys.veloc;pos.heliocentricfloatnullablee_RV? Radial velocity uncertaintym/sstat.errorfloatnullableCRXChromatic index (in m/s/Np units)m/sspect.indexfloate_CRXChromatic index uncertainty (in m/s/Np units)m/sstat.errorfloatHalphaHalpha index0.1nmspect.indexfloate_HalphaHalpha index uncertainty0.1nmstat.error;spect.linefloatCaIRTbCaII-IRT1 index0.1nmspect.indexfloate_CaIRTbCaII-IRT1 index uncertainty0.1nmstat.errorfloatNaD1NaD1 index0.1nmspect.indexfloate_NaD1NaD1 index uncertainty0.1nmstat.errorfloatNaD2NaD2 index0.1nmspect.indexfloate_NaD2NaD2 index uncertainty0.1nmstat.errorfloatTiO7050? TiO absorption band index at 7050{AA}0.1nmspect.indexdoublenullablee_TiO7050? TiO absorption band index at 7050{AA} uncertainty0.1nmstat.errordoublenullableTiO8430? TiO absorption band index at 8430{AA}0.1nmspect.indexfloatnullablee_TiO8430? TiO absorption band index at 8430{AA} uncertainty0.1nmstat.errorfloatnullableTiO8860? TiO absorption band index at 8860{AA}0.1nmspect.indexfloatnullablee_TiO8860? TiO absorption band index at 8860{AA} uncertainty0.1nmstat.errorfloatnullable