J/A+A/624/A123ivo://CDS.VizieR/J/A+A/624/A123doi:10.26093/cds/vizier.36240123CDSPerger M.Scandariato G.Ribas I.Morales J.C.Affer L.Azzaro M.,Amado P.J.Anglada-Escude G.Baroch D.Barrado D.Bauer F.F.,Bejar V.J.S.Caballero J.A.Cortes-Contreras M.Damasso M.Dreizler S.,Gonzalez-Cuesta L.Gonzalez Hernandez J.I.Guenther E.W.Henning T.,Herrero E.Jeffers S.V.Kaminski A.Kuerster M.Lafarga M.Leto G.,Lopez-Gonzalez M.J.Maldonado J.Micela G.Montes D.Pinamonti M.,Quirrenbach A.Rebolo R.Reiners A.Rodriguez E.Rodriguez-Lopez C.,Schmitt J.H.M.M.Sozzetti A.SuarezMascareno A.Toledo-Padron B.,Zanmar Sanchez R.Zapatero Osorio M.R.Zechmeister M.2019-05-09T14:47:47Z2019-04-24T07:24:34ZCDS support team

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

cds-question@unistra.frmultiple-starsexoplanetsradial-velocityspectroscopySmall planets around low-mass stars often show orbital periods in a range that corresponds to the temperate zones of their host stars which are therefore of prime interest for planet searches. Surface phenomena such as spots and faculae create periodic signals in radial velocities and in observational activity tracers in the same range, so they can mimic or hide true planetary signals. We aim to detect Doppler signals corresponding to planetary companions, determine their most probable orbital configurations, and understand the stellar activity and its impact on different datasets. We analyzed 22 years of data of the M1.5V-type star Gl 49 (BD+61 195) including HARPS-N and CARMENES spectrographs, complemented by APT2 and SNO photometry. Activity indices are calculated from the observed spectra, and all datasets are analyzed with periodograms and noise models. We investigated how the variation of stellar activity imprints on our datasets. We further tested the origin of the signals and investigate phase shifts between the different sets. To search for the best-fit model we maximize the likelihood function in a Markov chain Monte Carlo approach. As a result of this study, we are able to detect the super-Earth Gl 49b with a minimum mass of 5.6M_{earth}_. It orbits its host star with a period of 13.85d at a semi-major axis of 0.090au and we calculate an equilibrium temperature of 350K and a transit probability of 2.0%. The contribution from the spot-dominated host star to the different datasets is complex, and includes signals from the stellar rotation at 18.86d, evolutionary timescales of activity phenomena at 40-80d, and a long-term variation of at least four years.2019A&A...624A.123Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/624/A123CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/624/A123https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/624/A123http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/624/A123https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/624/A123https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/624/A123http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/624/A123GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/624/A123/tablea1Radial velocity and activity indicator time-series data of Gl 49NaI? NaI indexmeta.code;spect.indexfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian date (BJD-2450000)dtime.epochdoubleRVRadial velocitym/sphys.veloc;pos.heliocentricdoublee_RV? Radial velocity uncertaintym/sstat.errorfloatnullableCaHK/CaIRT? CaHK/CaIRT index for HARPS-N/CARMENESspect.indexfloatnullablee_CaHK/CaIRT? CaHK/CaIRT index uncertaintystat.errorfloatnullableHa? H-alpha indexspect.index;em.line.Halphafloatnullablee_Ha? H-alpha index uncertaintystat.errorfloatnullablee_NaI? NaI index uncertaintystat.errorfloatnullableFWHM? FWHM of CCFkm/sspect.line.widthfloatnullablee_FWHM? FWHM index uncertaintykm/sstat.error;phys.angSizefloatnullableCON? Contrast of CCF%phot.flux;arith.ratiofloatnullablee_CON? CON index uncertainty%stat.errorfloatnullableBIS? Bisector inverse slope of CCFm/sphys.velocfloatnullablee_BIS? BIS index uncertaintym/sstat.errorfloatnullableCRX? Chromatic index (in m/s/Np unit)spect.indexfloatnullablee_CRX? CRX index uncertainty (in m/s/Np unit)stat.errorfloatnullableInstInstrument (HARPS-N, HIRES or CARMENES)meta.id;instrcharSeasonSeason (S0-S6)meta.id;obschar