J/A+A/620/A171ivo://CDS.VizieR/J/A+A/620/A171doi:10.26093/cds/vizier.36200171CDSLuque R.Nowak G.Palle E.Kossakowski D.Trifonov T.Zechmeister M.,Bejar V.J.S.Cardona Guillen C.Tal-Or L.Hidalgo D.Ribas I.,Reiners A.Caballero J.A.Amado P.J.Quirrenbach A.Aceituno J.,Cortes-Contreras M.Diez-Alonso E.Dreizler S.Guenther E.W.,Henning T.Jeffers S.V.Kaminski A.Kuerster M.Lafarga M.Montes D.,Morales J.C.Passegger V.M.Schmitt J.H.M.M.Schweitzer A.2019-01-08T14:55:59Z2018-12-14T08:34:32ZCDS support team

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

cds-question@unistra.frmultiple-starsexoplanetsradial-velocityWe announce the discovery of two planetary companions orbiting around the low-mass stars Ross 1020 (GJ 3779, M4.0V) and LP 819-052 (GJ 1265, M4.5V). The discovery is based on the analysis of CARMENES radial velocity (RV) observations in the visual channel as part of its survey for exoplanets around M dwarfs. In the case of GJ 1265, CARMENES observations were complemented with publicly available Doppler measurements from HARPS. The datasets reveal two planetary companions, one for each star, that share very similar properties: minimum masses of 8.0+/-0.5M_{Earth}_ and 7.4+/-0.5M_{Earth}_ in low-eccentricity orbits with periods of 3.023+/-0.001d and 3.651+/-0.001d for GJ 3779 b and GJ 1265 b, respectively. The periodic signals around three days found in the RV data have no counterpart in any spectral activity indicator. Furthermore, we collected available photometric data for the two host stars, which confirm that the additional Doppler variations found at periods of approximately 95d can be attributed to the rotation of the stars. The addition of these planets to a mass-period diagram of known planets around M dwarfs suggests a bimodal distribution with a lack of short-period low-mass planets in the range of 2-5M_{Earth}_. It also indicates that super-Earths (>5M_{Earth}_) currently detected by RV and transit techniques around M stars are usually found in systems dominated by a single planet.2018A&A...620A.171Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/620/A171CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/609/A117 : CARMENES radial velocity curves of 7 M-dwarf (Trifonov+ 2018)J/A+A/609/L5 : HD 147379 b velocity curve (Reiners+, 2018)J/A+A/618/A115 : HD 147379 radial velocities (Kaminski+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/620/A171https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/620/A171http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/620/A171https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/620/A171https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/620/A171http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/620/A171GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/620/A171/table1GJ 3779 radial velocitiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian date of observationdtime.epochdoubleRVRadial velocitym/sphys.veloc;pos.heliocentricfloate_RVRadial velocity uncertaintym/sstat.errorfloatInstInstrument (CARMENES or HARPS)meta.id;instrcharJ/A+A/620/A171/table2GJ 1265 radial velocitiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian date of observationdtime.epochdoubleRVRadial velocitym/sphys.veloc;pos.heliocentricfloate_RVRadial velocity uncertaintym/sstat.errorfloatInstInstrument (CARMENES or HARPS)meta.id;instrchar