J/A+A/620/A139ivo://CDS.VizieR/J/A+A/620/A139doi:10.26093/cds/vizier.36200139CDSLeao I.C.Canto Martins B.L.Alves S.Pereira De Oliveira G.Cortes C.,Brucalassi A.Melo C.H.F.De Freitas D.B.Pasquini L.de Medeiros J.R.2019-03-21T10:58:49Z2019-03-12T08:09:51ZCDS support team

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

cds-question@unistra.fropen-star-clusterslate-type-starsradial-velocityDetecting exoplanets in clusters of different ages is a powerful tool for understanding a number of open questions, such as how the occurrence rate of planets depends on stellar metallicity, on mass, or on stellar environment. We present the first results of our HARPS long-term radial velocity (RV) survey which aims to discover exoplanets around intermediate-mass (between ~2 and 6M_{sun}_) evolved stars in open clusters. We selected 826 bona fide HARPS observations of 114 giants from an initial list of 29 open clusters and computed the half-peak to peak variability of the HARPS RV measurements, namely {Delta}RV/2, for each target, to search for the best planet-host candidates. We also performed time series analyses for a few targets for which we have enough observations to search for orbital solutions. Although we attempted to rule out the presence of binaries on the basis of previous surveys, we detected 14 new binary candidates in our sample, most of them identified from a comparison between HARPS and CORAVEL data. We also suggest 11 new planet-host candidates based on a relation between the stellar surface gravity and {Delta}RV/2. Ten of the candidates are less than 3M_{sun}_, showing evidence of a low planet occurrence rate for massive stars. One of the planet-host candidates and one of the binary candidates show very clear RV periodic variations, allowing us to confirm the discovery of a new planet and to compute the orbital solution for the binary. The planet is IC 4651 9122b, with a minimum mass of msini=6.3M_J_ and a semimajor axis a=2.0AU. The binary companion is NGC 5822 201B, with a very low minimum mass of msini=0.11M_{sun}_ and a semimajor axis a=6.5AU, which is comparable to the Jupiter distance to the Sun.2018A&A...620A.139Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/620/A139CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/485/303 : RVs for 1309 stars and 166 OCl (Mermilliod+, 2008)J/A+A/438/1163 : Catalogue of Open Cluster Data (Kharchenko+, 2005)J/MNRAS/399/2146 : Orbits of open clusters in the Galaxy (Wu+, 2009)J/A+A/561/A93 : On the metallicity of open clusters. II. (Heiter+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/620/A139https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/620/A139http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/620/A139https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/620/A139https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/620/A139http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/620/A139GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/620/A139/tablea1 (Analysis of Delta RV/2 for the final sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/620/A139/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/620/A139/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/620/A139/tablea1?GETtext/xml+votable180.050000true169.341155-62.8293937220.0055555555555555566/20903 21557 21586 21633 28818 29269 30438-30439 30444-30445 31812 37349-37351 37745 37920 37933 37944 37971 38242 38248 38432 39353 39356 39906 39912 39956 41834 42135 42153 42156 42216 42274 42464 43022https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/620/A139?format=asciidefaultJ/A+A/620/A139/rvRadial velocity and activity proxy dataBis? Bisector time span (1)m/sphys.velocdoublenullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameDesignation in the papermeta.bibcharBJDBaricentric Julian dayhtime.epochdoubleRVRadial velocitykm/sphys.veloc;pos.heliocentricdoublee_RVStandard error on radial velocitym/sstat.errorfloatFWHMFWHM of the CCFkm/sspect.line.widthfloatSNR400Signal-to-noise ratio at 400 nmstat.snrfloatSNR490Signal-to-noise ratio at 490 nmstat.snrfloate_BisUncertainty on bisector time spanm/sstat.errorfloatSindex? Uncalibrated S index (2)spect.index;stat.uncalibdoublenullablee_Sindex? Uncertainty on Sindex (2)stat.errordoublenullableqflagQuality flag (3)meta.code.qualcharProgIDESO Program IDmeta.id;obscharObsNameESO Observation namemeta.id;obscharJ/A+A/620/A139/tablea1Analysis of Delta RV/2 for the final samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRVDisplay the data of rv.dat filemeta.ref.urlcharNameDesignation in the papermeta.bibcharSNameSIMBAD recognizable namemeta.idcharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainVmag? Visual magnitude from SIMBADmagphot.mag;em.opt.VdoublenullableloggLogarithm of stellar surface gravitylog(cm.s**-2)phys.gravityfloatf_logg? Flag on logg (2)meta.codecharRVM08CORAVEL RV measurement from M08 (3)km/sspect.dopplerVelocdoubleNeffEffective number of HARPS observations (4)meta.numberinttspanTime span of HARPS observationsdtime.intervalintRVHRV average of HARPS observationskm/sspect.dopplerVeloc;obsdoubleDRV2Hhalf peak-to-peak RV, DeltaRV/2m/sspect.dopplerVelocdoubleDRVH-CDifference between HARPS and CORAVEL RVs (5)m/sspect.dopplerVelocintFlag? Candidate flag (6)meta.code.errorcharSimbadSimbad column added by the CDSmeta.ref.urlchar