J/A+A/637/A93ivo://CDS.VizieR/J/A+A/637/A93doi:10.26093/cds/vizier.36370093CDSGonzalez-Alvarez E.Zapatero Osorio M.R.Caballero J.A.Sanz-Forcada J.,Bejar V.J.S.Gonzalez-Cuesta L.Dreizler S.Bauer F.F.Rodriguez E.,Tal-Or L.Zechmeister M.Montes D.Lopez-Gonzalez M.J.Ribas I.,Reiners A.Quirrenbach A.Amado P.J.Anglada-Escude G.Azzaro M.,Cortes-Contreras M.Hatzes A.P.Henning T.Jeffers S.V.Kaminski A.,Kuerster M.Lafarga M.Morales J.C.Palle E.Perger M.Schmitt J.H.M.M.2022-09-09T12:11:54Z2020-05-27T08:51:15ZCDS support team

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

cds-question@unistra.frmultiple-starsm-starsexoplanetsradial-velocityWe report on radial velocity time series for two M0.0V stars, GJ 338 B and GJ 338 A, using the CARMENES spectrograph, complemented by ground-telescope photometry from Las Cumbres and Sierra Nevada observatories. We obtained 159 and 70 radial velocity measurements of GJ 338 B and A, respectively, with the CARMENES visible channel between 2016 January and 2018 October. We also compiled additional relative radial velocity measurements from the literature and a collection of astrometric data that cover 200yr of observations to solve for the binary orbit. We found dynamical masses of 0.64+/-0.07M_{sun}_ for GJ338B and 0.69+/-0.07M_{sun}_ for GJ338A. The CARMENES radial velocity periodograms show significant peaks at 16.61+/-0.04d (GJ 338 B) and 16.3+/-3.5d (GJ 338 A), which have counterparts at the same frequencies in CARMENES activity indicators and photometric light curves. We attribute these to stellar rotation. GJ 338 B shows two additional, significant signals at 8.27+/-0.01 and 24.45+/-0.02d, with no obvious counterparts in the stellar activity indices. The former is likely the first harmonic of the star's rotation, while we ascribe the latter to the existence of a super-Earth planet with a minimum mass of 10.27+/-1.47M_{Earth}_ orbiting GJ 338 B.2020A&A...637A..93Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/637/A93CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/637/A93https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/637/A93http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/637/A93https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/637/A93https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/637/A93http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/637/A93GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/637/A93/tableb1GJ 338 B data of the CARMENES observationsBJDBarycentric Julian datedtime.epochdoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRVRadial velocitym/sphys.veloc;pos.heliocentricfloate_RVError on Radial velocitym/sstat.errorfloatdLW? Differential line widthm**2.s**-2spect.line.width;arith.difffloatnullablee_dLW? Error on Differential line widthm**2.s**-2stat.errorfloatnullableHalpha? Halphameta.notedoublenullablee_Halpha? Error on Halphastat.error;spect.linedoublenullableFWHM? Full width high maximumkm/sspect.line.width;stat.maxfloatnullablee_FWHM? Error on Full width high maximumkm/sstat.error;phys.angSizefloatnullableContrast? Contraststat.fit.paramfloatnullablee_Contrast? Error on Contraststat.errorfloatnullableBIS? Bisector spankm/sphys.velocdoublenullablee_BIS? Error on Bisector spankm/sstat.errorfloatnullableIRT1? CaII triplet 8498{AA} activity indicatorphot.flux;arith.ratiofloatnullablee_IRT1? Error on CaII triplet 8498{AA}stat.errorfloatnullableIRT2? CaII triplet 8542{AA} activity indicatorphot.flux;arith.ratiofloatnullablee_IRT2? Error on CaII triplet 8542{AA}stat.errorfloatnullableIRT3? CaII triplet 8662{AA} activity indicatorphot.flux;arith.ratiofloatnullablee_IRT3? Error on CaII triplet 8662{AA}stat.errorfloatnullableCRX? Chromatic index, in m/(dex.s) unitm/sspect.indexfloatnullablee_CRX? Error on Chromatic index, in m/(dex.s) unitm/sstat.errorfloatnullableJ/A+A/637/A93/tableb2GJ 338 A data of the CARMENES observationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian datedtime.epochdoubleRVRadial velocitym/sphys.veloc;pos.heliocentricfloate_RVError on Radial velocitym/sstat.errorfloatdLWDifferential line widthm**2.s**-2spect.line.width;arith.difffloate_dLWError on Differential line widthm**2.s**-2stat.errorfloatHalphaHalphameta.notefloate_HalphaError on Halphastat.error;spect.linefloatIRT1CaII triplet 8498{AA}phot.flux;arith.ratiofloate_IRT1Error on CaII triplet 8498{AA}stat.errorfloatIRT2CaII triplet 8542{AA}phot.flux;arith.ratiofloate_IRT2Error on CaII triplet 8542{AA}stat.errorfloatIRT3CaII triplet 8662{AA}phot.flux;arith.ratiofloate_IRT3Error on CaII triplet 8662{AA}stat.errorfloatJ/A+A/637/A93/tableb3Relative and differential RVs for binary GJ338AB computed with common template (GJ338B)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian datedtime.epochdoubleRVARadial velocity GJ338Am/sphys.veloc;pos.heliocentricdoublee_RVAError on Radial velocity GJ338Am/sstat.errorfloatRVBRadial velocity GJ338Bm/sphys.veloc;pos.heliocentricdoublee_RVBError on Radial velocity GJ338Bm/sstat.errorfloatRVA-RVBDifferential RVs for binary GJ338AB computed with common template (GJ338B)m/sphys.veloc;arith.diffdoublee_RVA-RVBError on differential RVs for binary GJ338AB computed with common template (GJ338B)m/sstat.errorfloatInstInstrument namemeta.id;instrcharJ/A+A/637/A93/tableb4Relative radial velocity measurements of GJ338B with CARMENES in the NIRrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian datedtime.epochdoubleRVRadial velocity in the NIRm/sphys.veloc;pos.heliocentricfloate_RVError on Radial velocity in the NIRm/sstat.errorfloatJ/A+A/637/A93/tableb5Relative astrometric position of the binary companion GJ 338 B to GJ 338 AthetaPosition angledegpos.posAngfloatrhoSeparationarcsecpos.angDistance;src.orbitalfloatRefReference, in tableb6.datmeta.ref;pos.framecharEpochEpochatime.epochdoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJ/A+A/637/A93/tableb6References in tableb5recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReferencemeta.ref;pos.frame;meta.maincharprimaryBibCodeBibCodemeta.bib.bibcodecharAutAuthors' namemeta.id;meta.maincharComCommentsmeta.notechar