J/A+A/627/A116ivo://CDS.VizieR/J/A+A/627/A116doi:10.26093/cds/vizier.36270116CDSLalitha S.Baroch D.Morales J.C.Passegger V.M.Bauer F.F.,Cardona Guillen C.Dreizler S.Oshagh M.Reiners A.Ribas I.,Caballero J.A.Quirrenbach A.Amado P.J.Bejar V.J.S.Colome J.,Cortes-Contreras M.Galadi-Enriquez D.Gonzalez-Cuesta L.Guenther E.W.,Hagen H.-J.Henning T.Herrero E.Husser T.-O.Jeffers S.V.,Kaminski A.Kuerster M.Lafarga M.Lodieu N.Lopez-Gonzalez M.J.,Montes D.Perger M.Rosich A.Rodriguez E.Rodriguez-Lopez C.,Schmitt J.H.M.M.Tal-Or L.Zechmeister M.2019-10-16T14:24:06Z2019-07-11T09:27:53ZCDS support team

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

cds-question@unistra.frm-starsdwarf-starsexoplanetsradial-velocityAlthough M dwarfs are known for high levels of stellar activity, they are ideal targets for the search of low-mass exoplanets with the radial velocity (RV) method. We report the discovery of a planetary-mass companion around LSPM J2116+0234 (M3.0 V) and confirm the existence of a planet orbiting GJ 686 (BD+18 3421; M1.0 V). The discovery of the planet around LSPM J2116+0234 is based on CARMENES RV observations in the visual and near-infrared channels. We confirm the planet orbiting around GJ 686 by analyzing the RV data spanning over two decades of observations from CARMENES VIS, HARPS-N, HARPS, and HIRES. We find planetary signals at 14.44 and 15.53d in the RV data for LSPM J2116+0234 and GJ 686, respectively. Additionally, the RV, photometric time series, and various spectroscopic indicators show hints of variations of 42 d for LSPM J2116+0234 and 37 d for GJ 686, which we attribute to the stellar rotation periods. The orbital parameters of the planets are modeled with Keplerian fits together with correlated noise from the stellar activity. A mini-Neptune with a minimum mass of 11.8M_{Earth}_ orbits LSPM J2116+0234 producing a RV semi- amplitude of 6.19m/s, while a super-Earth of mass 6.6M_{Earth}_ orbits GJ 686 and produces a RV semi-amplitude of 3.0m/s. Both LSPM J2116+0234 and GJ 686 have planetary companions populating the regime of exoplanets with masses lower than 15M_{Earth}_ and orbital periods <20d.2019A&A...627A.116Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/627/A116CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/627/A116https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/627/A116http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/627/A116https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/627/A116https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/627/A116http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/627/A116GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/627/A116/tablea1Radial velocities of LSPM J2116+0234recnoRecord 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 (1)meta.id;instrcharJ/A+A/627/A116/tablea2Radial velocities of GJ686recnoRecord 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 (1)meta.id;instrchar