J/A+A/666/A155ivo://CDS.VizieR/J/A+A/666/A155doi:10.26093/cds/vizier.36660155CDSChaturvedi P.Bluhm P.Nagel E.Hatzes A.P.Morello G.Brady M.,Korth J.Molaverdikhani K.Kossakowski D.Caballero J.A.Guenther E.W.,Palle E.Espinoza N.Seifahrt A.Lodieu N.Cifuentes C.Furlan E.,Amado P.J.Barclay T.Bean J.Bejar V.J.S.Bergond G.Boyle A.W.,Ciardi D.Collins K.A.Collins K.I.Esparza-Borges E.Fukui A.,Gnilka C.L.Goeke R.Guerra P.Henning T.Herrero E.Howell S.B.,Jeffers S.V.Jenkins J.M.Jensen E.L.N.Kasper D.Kodama T.,Latham D.W.Lopez-Gonzalez M.J.Luque R.Montes D.Morales J.C.,Mori M.Murgas F.Narita N.Nowak G.Parviainen H.Passegger V.M.,Quirrenbach A.Reffert S.Reiners A.Ribas I.Ricker G.R.Rodriguez E.,Rodriguez-Lopez C.Schlecker M.Schwarz R.P.Schweitzer A.Seager S.,Stefansson G.Stockdale C.Tal-Or L.Twicken J.D.Vanaverbeke S.,Wang G.Watanabe D.Winn J.N.Zechmeister M.2022-10-24T08:45:38Z2022-10-21T10:16:47ZCDS support team

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

cds-question@unistra.frmultiple-starsexoplanetsphotometryvisible-astronomyradial-velocityWe report the discovery and characterization of two small transiting planets orbiting the bright M3.0 V star TOI-1468 (LSPM J0106+1913), whose transit signals were detected in the photometric time series in three sectors of the TESS mission. We confirm the planetary nature of both of them using precise radial velocity measurements from the CARMENES and MAROON-X spectrographs, and supplemented it with ground-based transit photometry. A joint analysis of all these data reveals that the shorter-period planet, TOI-1468b (P_b_=1.88d), has a planetary mass of M_b_= 3.21+/-0.24M_{earth} and a radius of R_b_=1.280^+0.038_-0.039_R_{earth}, resulting in a density of rho_b_=8.39^+ 1.05^_-0.92_g/cm^3^, which is consistent with a mostly rocky composition. For the outer planet, TOI-1468c (P_c_=15.53d), we derive a mass of M_c_=6.64^+ 0.67^_-0.68_M_{earth}, a radius of R_c_=2.06+/-0.04R_{earth}, and a bulk density of rho_c_=2.00^+ 0.21^_-0.19_g/cm^3^, which corresponds to a rocky core composition with a H/He gas envelope. These planets are located on the opposite sides of the radius valley, making our system an interesting discovery as there are only a handful of other systems with the same properties. This finding can then further help determine a more precise location of the radius valley for small planets around M dwarfs and, therefore, shed more light on planet formation and evolution scenarios.2022A&A...666A.155Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/666/A155CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/666/A155https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/666/A155http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/666/A155https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/666/A155https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/666/A155http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/666/A155GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/666/A155/table2Ground-based observations of TOI-1468 transitsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPlanetTransiting planet TOI-1468b or TOI-1468cmeta.id;meta.maincharTelGround-based facility used for the transit observationsinstr.setupcharInstTransit detecting instrumentinstrcharFilterFilter used for making the transit observationsinstr.setup;instr.filtercharscaleInstrument pixel scalearcsec/pixinstr.scale;instr.pixelfloatPSF? Point Spread Functionarcsecinstr.det.psffloatnullablen_PSF[c]meta.notecharapRad? Radius of the photometric aperturepixinstr.setupfloatnullableDateObservation datetime.epoch;obsnullableDurTransit durationmintime.durationfloatDataset[Yes ] Datasets finally used for the analysisinstr.setupcharJ/A+A/666/A155/tableb2CARMENES radial velocities and spectroscopic activity indicatorsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian date in the barycentric dynamical time standarddtime.epochdoubleRVRadial velocitym/sphys.veloc;pos.heliocentricfloate_RVrms uncertainty on Radial velocitym/sstat.errorfloatCaII-IRT1? CaII IRT_1_ activity indicatorspect.indexfloatnullablee_CaII-IRT1? rms uncertainty on CaII-IRT1stat.errorfloatnullableCRXChromatic index (m/(s.Np) unit)m/sspect.indexfloate_CRXrms uncertainty on CRX (m/(s.Np) unit)m/sstat.errorfloatdLWDifferential line widthm**2.s**-2spect.line.widthfloate_dLWrms uncertainty on dLWm**2.s**-2stat.errorfloatHalphaFWHM H{alpha} activity indicatorinstr.setup;spect.linefloate_Halpharms uncertainty on Halphastat.error;spect.linefloatNaI-D2? NaI-D_2_ activity indicatorspect.indexfloatnullablee_NaI-D2? rms uncertainty on NaI-D2stat.errorfloatnullableArm[Blue Red] Arm for tableb3.dat onlymeta.id;instrcharJ/A+A/666/A155/tableb3MAROON-X radial velocities and spectroscopic activity indicators each for the blue and red arms respectivelyrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian date in the barycentric dynamical time standarddtime.epochdoubleRVRadial velocitym/sphys.veloc;pos.heliocentricfloate_RVrms uncertainty on Radial velocitym/sstat.errorfloatCaII-IRT1? CaII IRT_1_ activity indicatorspect.indexfloatnullablee_CaII-IRT1? rms uncertainty on CaII-IRT1stat.errorfloatnullableCRXChromatic index (m/(s.Np) unit)m/sspect.indexfloate_CRXrms uncertainty on CRX (m/(s.Np) unit)m/sstat.errorfloatdLWDifferential line widthm**2.s**-2spect.line.widthfloate_dLWrms uncertainty on dLWm**2.s**-2stat.errorfloatHalphaFWHM H{alpha} activity indicatorinstr.setup;spect.linefloate_Halpharms uncertainty on Halphastat.error;spect.linefloatNaI-D2? NaI-D_2_ activity indicatorspect.indexfloatnullablee_NaI-D2? rms uncertainty on NaI-D2stat.errorfloatnullableArm[Blue Red] Arm for tableb3.dat onlymeta.id;instrchar