J/A+A/627/A49ivo://CDS.VizieR/J/A+A/627/A49doi:10.26093/cds/vizier.36270049CDSZechmeister M.Dreizler M.Ribas I.Reiners A.Caballero J. A.,Bauer F.F.Bejar V.J.S.Gonzalez-Cuesta L.Herrero E.Lalitha S.,Lopez-Gonzalez M.J.Luque R.Morales J.C.Palle E.Rodriguez E.,Rodriguez Lopez C.Tal-Or L.Anglada-Escude G.Quirrenbach A.,Amado P.J.Abril M.Aceituno F.J.Aceituno J.Alonso-Floriano F.J.,Ammler-von Eiff M.Antona Jimenez R.Anwand-Heerwart H.Arroyo-Torres B.,Azzaro M.Baroch D.Barrado D.Becerril S.Benitez D.Berdinas Z.M.,Bergond G.Bluhm P.Brinkmoeller M.del Burgo C.Calvo Ortega R.,Cano J.Cardona Guillen C.Carro J.Cardenas Vazquez M.C.Casal E.,Casasayas-Barris N.Casanova V.Chaturvedi P.Cifuentes C.Claret A.,Colome J.Cortes-Contreras M.Czesla S.Diez-Alonso E.Dorda R.,Fernandez M.Fernandez-Martin A.Fuhrmeister B.Fukui A.,Galadi-Enriquez D.Gallardo Cava I.Garcia de la Fuente J.,Garcia-Piquer A.Garcia Vargas M.L.Gesa L.Gongora Rueda J.,Gonzalez-Alvarez E.Gonzalez Hernandez J.I.Gonzalez-Peinado R.,Groezinger U.Guardia J.Guijarro A.de Guindos E.Hatzes A.P.,Hauschildt P.H.Hedrosa R.P.Helmling J.Henning T.Hermelo I.,Hernandez Arabi R.Hernandez Castano L.Hernandez Otero F.Hintz D.,Huke P.Huber A.Jeffers S.V.Johnson E.N.de Juan E.Kaminski A.,Kemmer J.Kim M.Klahr H.Klein R.Klueter J.Klutsch A.,Kossakowski D.Kuerster M.Labarga F.Lafarga M.Llamas M.Lampon M.,Lara L.M.Launhardt R.Lazaro F.J.Lodieu N.Lopez del Fresno M.,Lopez-Puertas M.Lopez Salas J.F.Lopez-Santiago J.,Magan Madinabeitia H.Mall U.Mancini L.Mandel H.Marfil E.,Marin Molina J.A.Maroto Fernandez D.Martin E.L.Martin-Fernandez P.,Martin-Ruiz S.Marvin C.J.Mirabet E.Montanes-Rodriguez P.Montes D.,Moreno-Raya M.E.Nagel E.Naranjo V.Narita N.Nortmann L.Nowak G.,Ofir A.Oshagh M.Panduro J.Parviainen H.Pascual J.Passegger V.M.,Pavlov A.Pedraz S.Perez-Calpena A.Perez Medialdea D.Perger M.,Perryman M.A.C.Rabaza O.Ramon Ballesta A.Rebolo R.Redondo P.,Reffert S.Reinhardt S.Rhode P.Rix H.-W.Rodler F.,Rodriguez Trinidad A.Rosich A.Sadegi S.Sanchez-Blanco E.,Sanchez Carrasco M.A.Sanchez-Lopez A.Sanz-Forcada J.Sarkis P.,Sarmiento L.F.Schaefer S.Schmitt J.H.M.M.Schoefer P.Schweitzer A.,Seifert W.Shulyak D.Solano E.Sota A.Stahl O.Stock S.,Strachan J.B.P.Stuber T.Stuermer J.Suarez J.C.Tabernero H.M.,Tala Pinto M.Trifonov T.Veredas G.Vico Linares J.I.Vilardell F.,Wagner K.Wolthoff V.Xu W.Yan F.Zapatero Osorio M.R.2022-09-09T12:09:49Z2019-07-01T07:07:37ZCDS support team

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

cds-question@unistra.frm-starsradial-velocityTeegarden's Star is the brightest and one of the nearest ultra-cool dwarfs in the solar neighbourhood. For its late spectral type (M7.0 V), the star shows relatively little activity and is a prime target for near-infrared radial velocity surveys such as CARMENES. As part of the CARMENES search for exoplanets around M dwarfs, we obtained more than 200 radial-velocity measurements of Teegarden's Star and analysed them for planetary signals. We find periodic variability in the radial velocities of Teegarden's Star. We studied photometric measurements to rule out stellar brightness variations mimicking planetary signals. We find evidence for two planet candidates, each with 1.1M_{Earth}_ minimum mass, orbiting at periods of 4.91d and 11.4d, respectively. No evidence for planetary transits could be found in archival and follow-up photometry. Small photometric variability is suggestive of slow rotation and old age. The two planets are among the lowest-mass planets discovered so far, and they are the first Earth-mass planets around an ultra-cool dwarf for which the masses have been determined using radial velocities.2019A&A...627A..49Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/627/A49CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/ApJ/834/85 : H{alpha} emission in nearby M dwarfs (Newton+, 2017)J/A+A/597/A47 : CARMENES input catalog of M dwarfs II (Cortes-Contreras+ 2017)J/A+A/612/A49 : 324 CARMENES M dwarfs velocities (Reiners+, 2018)J/A+A/623/A44 : CARMENES M-dwarfs activity indicators (Schoefer+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/627/A49https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/627/A49http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/627/A49https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/627/A49https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/627/A49http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/627/A49GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/627/A49/rv_visCARMENES_VIS RVs for Teegarden's StarrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian datedtime.epochdoubleRVRadial velocitym/sphys.veloc;pos.heliocentricfloate_RVRadial velocity errorm/sstat.errorfloatCRXChromatic indexm/sspect.indexfloate_CRXChromatic index errorm/sstat.errorfloatdLWDifferential line widthspect.line.width;arith.difffloate_dLWDifferential line width errorstat.errorfloatHalphaHalpha indexspect.indexfloate_HalphaHalpha index errorstat.error;spect.linefloatf_RV[0/1] Bitwise flag (1)meta.codeintJ/A+A/627/A49/rv_nirCARMENES-NIR RVs for Teegarden's StarrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian datedtime.epochdoubleRVRadial velocitym/sphys.veloc;pos.heliocentricfloate_RVRadial velocity errorm/sstat.errorfloatCRXChromatic indexm/sspect.indexfloate_CRXChromatic index errorm/sstat.errorfloatdLWDifferential line widthspect.line.width;arith.difffloate_dLWDifferential line width errorstat.errorfloatf_RV[0/4] Bitwise flag (1)meta.codeint