J/A+A/557/A10ivo://CDS.VizieR/J/A+A/557/A10doi:10.26093/cds/vizier.35570010CDSNetopil M.Paunzen E.2017-09-29T09:02:56Z2013-09-23T15:47:00ZCDS support team

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

cds-question@unistra.fropen-star-clustersinterstellar-reddeningmetallicityOpen clusters are a useful tool when investigating several topics connected with stellar evolution; for example the age or distance can be more accurately determined than for field stars. However, one important parameter, the metallicity, is only known for a marginal percentage of open clusters. We aim at a consistent set of parameters for the open clusters investigated in our photometric Delta-a survey of chemically peculiar stars. Special attention is paid to expanding our knowledge of cluster metallicities and verifying their scale. Making use of a previously developed method based on normalised evolutionary grids and photometric data, the distance, age, reddening, and metallicity of open clusters were derived. To transform photometric measurements into effective temperatures to use as input for our method, a set of temperature calibrations for the most commonly used colour indices and photometric systems was compiled. We analysed 58 open clusters in total. Our derived metallicity values were in excellent agreement with about 30 spectroscopically studied targets. The mean value of the absolute deviations was found to be 0.03dex, with no noticeable offset or gradient. The method was also applied using recent evolutionary models based on the currently accepted lower solar abundance value Z~0.014. No significant differences were found compared to grids using the former adopted solar value Z=0.02. Furthermore, some divergent photometric datasets were identified and discussed. The method provides an accurate way of obtaining properly scaled metallicity values for open clusters. In light of present and future homogeneous photometric sky surveys, the sample of stellar clusters can be extended to the outskirts of the Milky Way, where spectroscopic studies are almost impossible. This will help for determining galactic metallicity gradients in more detail.2013A&A...557A..10Nhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/557/A10CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/ocl : Optically visible open clusters and Candidates (Dias+ 2002-2013)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/557/A10https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/557/A10http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/557/A10https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/557/A10https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/557/A10http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/557/A10GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/557/A10/table2 (Parameters for 58 open clusters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/557/A10/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/557/A10/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/557/A10/table2?GETtext/xml+votable180.050000true65.1544.91670.0055555555555555566/463 1653 2395 3138 4698 12990 14059 14210 14221 14324 14336 20797 21529 21531 21647 22058 23410 24522 28480 28711 28806 28822 28825 29081 30215 30506 31790 33099 37231 37237 37351 37592 37790 37933 37971 38073 39251 39354 39374 39697 39739 39770 39901 40071 40104 41461 41670 41682 41699 41809 41863 42155 42159 42203 42216 42402 42464 43301https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/557/A10?format=asciiOpticaldefaultJ/A+A/557/A10/table2Parameters for 58 open clustersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameCluster namemeta.id;meta.maincharOName? Other cluster ID (IAU number)meta.idcharlog(t)[7.3/9] Age (log scale)log(yr)time.agefloatDM0True cluster distance modulusmagphot.mag.distModfloatE(B-V)Cluster reddeningmagphot.color.excessfloate_E(B-V)? Standard error on E(B-V) (1)magstat.errorfloatnullableZ[0.014/0.031] Overall cluster metallicityphys.abund.Zfloate_ZError on Zstat.error;src.redshiftfloat[Fe/H][-0.16/0.24] Iron abundance (2)log(Sun)phys.abund.Fefloate_[Fe/H]Error on iron abundancelog(Sun)stat.error;phys.abund.FefloatSimbadSimbad column added by the CDSmeta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main