J/A+A/656/A124ivo://CDS.VizieR/J/A+A/656/A124doi:10.26093/cds/vizier.36560124CDSKossakowski D.Kemmer J.Bluhm P.Stock S.Caballero J.A.Bejar V.J.S.,Cardona Guillen C.Lodieu N.Collins K.A.Oshagh M.Schlecker M.,Espinoza N.Palle E.Henning Th.Kreidberg L.Kuerster M.Amado P.J.,Anderson D.R.Morales J.C.Cartwright S.Charbonneau D.Chaturvedi P.,Cifuentes C.Conti D.M.Cortes-Contreras M.Dreizler S.,Galadi-Enriquez D.Guerra P.Hart R.Hellier C.Henze C.Herrero E.,Jeffers S.V.Jenkins J.M.Jensen E.L.N.Kaminski A.Kielkopf J.F.,Kunimoto M.Lafarga M.Latham D.W.Lillo-Box J.Luque R.,Molvaerdikhani K.Montes D.Morello G.Morgan E.H.Nowak G.Pavlov A.,Perger M.Quintana E.V.Quirrenbach A.Reffert S.Reiners A.Ricker G.,Ribas I.Rodriguez Lopez C.Zapatero Osorio M.R.Seager S.Schoefer P.,Schweitzer A.Trifonov T.Vanaverbeke S.Vanderspek R.West R.Winn J.,Zechmeister M.2022-10-10T15:10:49Z2021-12-10T09:08:14ZCDS support team

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

cds-question@unistra.frmultiple-starsexoplanetsradial-velocityvisible-astronomyWe present the discovery of a transiting mini-Neptune around TOI-1201, a relatively bright and moderately young early M dwarf (J~9.5mag, ~600-800Myr) in an equal-mass ~8arcsecond-wide binary system, using data from the Transiting Exoplanet Survey Satellite (TESS), along with follow-up transit observations. With an orbital period of 2.49d, TOI-1201~b is a warm mini-Neptune with a radius of R_b_=2.415+/-0.090R_{Earth}_. This signal is also present in the precise radial velocity measurements from CARMENES, confirming the existence of the planet and providing a planetary mass of M_b_=6.28+/-0.88M_{Earth}_ and, thus, an estimated bulk density of 2.45^+0.48^_-0.42_g/cm^3^. The spectroscopic observations additionally show evidence of a signal with a period of 19d and a long periodic variation of undetermined origin. In combination with ground-based photometric monitoring from WASP-South and ASAS-SN, we attribute the 19d signal to the stellar rotation period (P_rot_=19-23d), although we cannot rule out that the variation seen in photometry belongs to the visually close binary companion. We calculate precise stellar parameters for both TOI-1201 and its companion. The transiting planet is an excellent target for atmosphere characterization (the transmission spectroscopy metric is 97^+21^_-16_) with the upcoming James Webb Space Telescope. It is also feasible to measure its spin-orbit alignment via the Rossiter-McLaughlin effect using current state-of-the-art spectrographs with submeter per second radial velocity precision.2021A&A...656A.124Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/656/A124CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/656/A124https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/656/A124http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/656/A124https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/656/A124https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/656/A124http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/656/A124GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/656/A124/tablee1TOI-1201: RVs and various stellar activity indicators from CARMENES VISBJDBarycentric Julian datedtime.epochdoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRVRadial velocitym/sphys.veloc;pos.heliocentricdoublee_RVRadial velocity uncertaintym/sstat.errordoubleCRXChromatic index (in m/s/Np)spect.indexdoublee_CRXChromatic index uncertainty(in m/s/Np)stat.errordoubledLWDifferential line width1000m**2.s**-2spect.line.widthdoublee_dLWDifferential line width uncertainty1000m**2.s**-2stat.errordoubleCairt1CaII-IRT1 index (8498.02) (-15,15)km/sspect.indexdoublee_Cairt1CaII-IRT1 index uncertaintystat.errordoubleCairt2CaII-IRT2 index (8542.09) (-15,15)km/sspect.indexdoublee_Cairt2CaII-IRT2 index uncertaintystat.errordoubleCairt3CaII-IRT3 index (8662.14) (-15,15)km/sspect.indexdoublee_Cairt3CaII-IRT3 index uncertaintystat.errordoubleHalphaH{alpha} indexspect.indexdoublee_HalphaH{alpha} index uncertaintystat.error;spect.linedoubleTiO7050Photospheric TiO absorption band index at 7050{AA}spect.indexdoublee_TiO7050Photospheric TiO absorption band index at 7050{AA} uncertaintystat.errordoubleTiO8430Photospheric TiO absorption band index at 8430{AA} indexspect.indexdoublee_TiO8430Photospheric TiO absorption band index at 8430{AA} index uncertaintystat.errordoubleTiO8860Photospheric TiO absorption band index at 8860{AA} indexspect.indexdoublee_TiO8860Photospheric TiO absorption band index at 8860{AA} index uncertaintystat.errordoubleBVSCCF bisector velocity spankm/sphys.velocdoublee_BVSCCF Bisector velocity span uncertaintykm/sstat.errordoubleCTRCCF contrast%stat.fit.paramdoublee_CTRCCF contrast uncertainty%stat.errordoubleFWHMCCF full width at half maximumkm/sspect.line.widthdoublee_FWHMCCF full width at half maximum uncertaintykm/sstat.error;phys.angSizedoubleJ/A+A/656/A124/tablee2PM J02489-1432E: RVs fand various stellar activity indicators from CARMENES VISRVRadial velocitym/sphys.veloc;pos.heliocentricdoublee_RVRadial velocity uncertaintym/sstat.errordoubleCRXChromatic index (in m/s/Np)spect.indexdoublee_CRXChromatic index uncertainty(in m/s/Np)stat.errordoubledLWDifferential line width1000m**2.s**-2spect.line.widthdoublee_dLWDifferential line width uncertainty1000m**2.s**-2stat.errordoubleCairt1CaII-IRT1 index (8498.02) (-15,15)km/sspect.indexdoublee_Cairt1CaII-IRT1 index uncertaintystat.errordoubleCairt2CaII-IRT2 index (8542.09) (-15,15)km/sspect.indexdoublee_Cairt2CaII-IRT2 index uncertaintystat.errordoubleCairt3CaII-IRT3 index (8662.14) (-15,15)km/sspect.indexdoubleCTRCCF contrast%stat.fit.paramdoubleTiO8860Photospheric TiO absorption band index at 8860{AA} indexspect.indexdoublee_TiO8860Photospheric TiO absorption band index at 8860{AA} index uncertaintystat.errordoubleBVSCCF bisector velocity spankm/sphys.velocdoublee_BVSCCF Bisector velocity span uncertaintykm/sstat.errordoublee_CTRCCF contrast uncertainty%stat.errordoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian datedtime.epochdoublee_Cairt3CaII-IRT3 index uncertaintystat.errordoubleHalphaH{alpha} indexspect.indexdoublee_HalphaH{alpha} index uncertaintystat.error;spect.linedoubleTiO7050Photospheric TiO absorption band index at 7050{AA}spect.indexdoublee_TiO7050Photospheric TiO absorption band index at 7050{AA} uncertaintystat.errordoubleTiO8430Photospheric TiO absorption band index at 8430{AA} indexspect.indexdoublee_TiO8430Photospheric TiO absorption band index at 8430{AA} index uncertaintystat.errordoubleFWHMCCF full width at half maximumkm/sspect.line.widthdoublee_FWHMCCF full width at half maximum uncertaintykm/sstat.error;phys.angSizedouble