J/A+A/626/A90ivo://CDS.VizieR/J/A+A/626/A90doi:10.26093/cds/vizier.36260090CDSHatzidimitriou D.Held E.V.Tognelli E.Bragaglia A.Magrini L.,Bravi L.Gazeas K.Dapergolas A.Drazdauskas A.Delgado-Mena E.,Friel E.D.Minkevi?ci-ut?e R.Sordo R.Tautvaisien?e G.Gilmore G.,Randich S.Feltzing S.Vallenari A.Alfaro E.J.Flaccomio E.,Lanzafame A.C.Pancino E.Smiljanic R.Bayo A.Bergemann M.Carraro G.,Casey A.R.Costado M.T.Damiani F.Franciosini E.Gonneau A.Jofre P.,Lewis J.Monaco L.Morbidelli L.Worley C.C.Zaggia S.2021-01-08T17:53:44Z2019-06-20T07:49:01ZCDS support team

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

cds-question@unistra.fropen-star-clustersradial-velocityphotometryPismis 18 is a moderately populated, intermediate-age open cluster located within the solar circle at a Galactocentric distance of about seven kpc. Few open clusters have been studied in detail in the inner disc region before the Gaia-ESO Survey. New data from the Gaia-ESO Survey allowed us to conduct an extended radial velocity membership study as well as spectroscopic metallicity and detailed chemical abundance measurements for this cluster. Gaia-ESO Survey data for 142 potential members, lying on the upper main sequence and on the red clump, yielded radial velocity measurements, which, together with proper motion measurements from the Gaia Second Data Release (Gaia DR2), were used to determine the systemic velocity of the cluster and membership of individual stars. Photometry from Gaia DR2 was used to re-determine cluster parameters based on high confidence member stars only. Cluster abundance measurements of six radial-velocity member stars with UVES high-resolution spectroscopy are presented for 23 elements. The average radial velocity of 26 high confidence members is -27.5+/-2.5(std)km/s with an average proper motion of pmra=-5.65+/-0.08(std)mas/yr and pmdec=-2.29+/-0.11(std)mas/yr. According to the new estimates, based on high confidence members, Pismis 18 has an age of {tau}=700^+40^_-50_Myr, interstellar reddening of E(B-V)=0.562^+0.012^_-0.026_mag and a de-reddened distance modulus of DM_0_=11.96^+0.10^_-0.24_mag. The median metallicity of the cluster (using the six UVES stars) is [Fe/H]=+0.23+/-0.05dex, with [{alpha}/Fe]=0.07+/-0.13 and a slight enhancement of s- and r- neutron-capture elements. With the present work, we fully characterized the open cluster Pismis 18.We confirmed its present location in the inner disc. We estimated a younger age than the previous literature values and we gave, for the first time, its metallicity and its detailed abundances. Its [{alpha}/Fe] and [s-process/Fe], both slightly super-solar, are in agreement with other inner-disc open clusters observed by the Gaia-ESO survey.2019A&A...626A..90Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/626/A90CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/626/A90https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/626/A90http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/626/A90https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/626/A90https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/626/A90http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/626/A90GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/626/A90/table2 (Photometry and radial velocities for all observed target)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/626/A90/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/626/A90/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/626/A90/table2?GETtext/xml+votable180.050000true203.9694583-61.92727780.0055555555555555566/416781.1166583743361574e-19 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/626/A90?format=asciidefaultJ/A+A/626/A90/table2Photometry and radial velocities for all observed targetPlx? Parallax from Gaia_DR2maspos.parallaxfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCNameTarget Name in the Gaia-ESO archive, HHMMSSss+DDMMSSsmeta.id;meta.maincharGaiaDR2? GAIA DR2 ID (source_id)meta.idnullableMemb[m] m denotes high confidence membershipmeta.code.member;stat.fit.paramcharRAJ2000Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainInstInstrumental setupinstr.setupcharRVRadial Velocity (km/sec)km/sphys.veloc;pos.heliocentricfloate_RVError in Radial Velocity (km/sec)km/sstat.errorfloatBpmag? Gaia_DR2 Bp magnitudemagphot.mag;em.opt.BfloatnullableGmag? Gaia_DR2 G magnitudemagphot.mag;em.optfloatnullableRpmag? Gaia_DR2 Rp magnitudemagphot.mag;em.opt.Rfloatnullablegmag? g-magnitude VPHAS_DR1magphot.mag;em.opt.Bfloatnullablee_gmag? Error in g-magnitude VPHAS_DR1magstat.error;phot.magfloatnullablermag? r-magnitude VPHAS_DR1magphot.mag;em.opt.Rfloatnullablee_rmag? Error in r-magnitude VPHAS_DR1magstat.error;phot.magfloatnullableimag? i-magnitude VPHAS_DR1magphot.mag;em.opt.Ifloatnullablee_imag? Error in i-magnitude VPHAS_DR1magstat.error;phot.magfloatnullableJmag? 2MASS J magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag? Error in 2MASS J magnitudemagstat.error;phot.magfloatnullableHmag2MASS H magnitudemagphot.mag;em.IR.Hfloate_Hmag? Error in 2MASS H magnitudemagstat.error;phot.magfloatnullableKmag? 2MASS K magnitudemagphot.mag;em.IR.Kfloatnullablee_Kmag? Error in 2MASS K magnitudemagstat.error;phot.magfloatnullableWebda? Webda IDmeta.idintnullableVmag? Column 25 V magnitude from Piatti et al. (1998AJ....116..801P)magphot.mag;em.opt.VfloatnullableB-V? B-V colour from Piatti et al. (1998AJ....116..801P)magphot.color;em.opt.B;em.opt.VfloatnullableV-I? V-I colour from Piatti et al. (1998AJ....116..801P)magphot.color;em.opt.V;em.opt.IfloatnullableDistProjected Radial distance from cluster centerarcminphys.angSizefloatRVC? Radial Velocity from Carlberg (2014AJ....147..138C, Cat. J/AJ/147/138)km/sspect.dopplerVelocfloatnullablee_Plx? Error in Parallax from Gaia_DR2masstat.error;pos.parallaxfloatnullablepmRA? Proper Motion in RA, pmRA*DEmas/yrpos.pm;pos.eq.rafloatnullablee_pmRA? Error in Proper Motion in RAmas/yrstat.error;pos.pm;pos.eq.rafloatnullablepmDE? Proper Motion in Decmas/yrpos.pm;pos.eq.decfloatnullablee_pmDE? Error in Proper Motion in DEmas/yrstat.error;pos.pm;pos.eq.decfloatnullableSimbadSimbad column added by the CDSmeta.ref.urlchar