J/A+A/679/A134ivo://CDS.VizieR/J/A+A/679/A134doi:10.26093/cds/vizier/bc-n7/lbdeCDSCovelo-Paz A.Themessl N.Espinoza-Rojas F.Hekker S.2026-07-01T14:01:12Z2023-11-29T09:57:32ZCDS support team

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

cds-question@unistra.fropen-star-clustersgiant-starsphotometryvisible-astronomyStars that are members of stellar clusters are assumed to be formed at the same time and place from material with the same initial chemical composition. These additional constraints on the ensemble of cluster stars make these stars suitable as benchmarks. We aimed (1) to identify previously unknown red giants in the open clusters NGC 6791 and NGC 6819, (2) to extract their asteroseismic parameters and (3) to determine their cluster membership. We followed a state-of-the-art method based on difference imaging to extract the light curves of potential red giants in NGC 6791 and NGC 6819 from Kepler superstamp data. We extracted the asteroseismic parameters of the stars that showed solar-like oscillations. We performed an asteroseismic membership study to identify which of these stars are likely to be cluster members. We found 149 red-giant stars within the Kepler superstamps, 93 of which are likely cluster members. We were able to find 29 red giants that are not primary targets of Kepler, and therefore their light curves had not been released previously. Five of these previously-unknown red giants have a cluster membership probability greater than 95%.2023A&A...679A.134Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/679/A134CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)V/133 : Kepler Input Catalog (Kepler Mission Team, 2009)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/679/A134https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/679/A134http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/679/A134https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/679/A134https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/679/A134http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/679/A134GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/679/A134/ngc6791 (NGC 6791 sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/679/A134/ngc6791?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/679/A134/ngc6791?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/679/A134/ngc6791?GETtext/xml+votable180.050000true290.185637.66870.005555555555555556Cone search capability for table J/A+A/679/A134/ngc6819 (NGC 6819 sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/679/A134/ngc6819?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/679/A134/ngc6819?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/679/A134/ngc6819?GETtext/xml+votable180.050000true295.298440.09010.0055555555555555565/3688 6/14573 145751.9867573869263685e-19 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/679/A134?format=asciiOpticaldefaultJ/A+A/679/A134/ngc6791NGC 6791 sourcesSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSequential number (1)meta.recordintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainGaiaDR3GaiaDR3 source_idmeta.idKIC? KIC numbermeta.id;meta.mainintnullableGmagGaia G magnitudemagphot.mag;em.optfloatnumaxFrequency at maximum poweruHzem.freq;src.varfloatPast[yes/no ] Member, this work (astero_member)meta.code.membercharb_numaxLower confidence level (16%) of numax (numax_16)uHzstat.fit.param;phys.atmol.levelfloatB_numaxUpper confidence level (16%) of numax (numax_84)uHzstat.fit.param;phys.atmol.levelfloatPS11[yes/no ] Member, Stello et al, 2011ApJ...739...13S (S11_member)meta.code.membercharPG20[0/1]? Member, Cantat-Gaudin & Anters, 2020A&A...633A..99C, Cat. J/A+A/633/A99 (prob_CG20)stat.fit.goodnessfloatnullableLCShow the light curvemeta.ref.urlcharFileNameName of the fits light curve file in subdirectory fitsmeta.id;meta.fitscharJ/A+A/679/A134/ngc6819NGC 6819 sourcesSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSequential number (1)meta.recordintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainGaiaDR3GaiaDR3 source_idmeta.idKIC? KIC numbermeta.id;meta.mainintnullableGmagGaia G magnitudemagphot.mag;em.optfloatnumaxFrequency at maximum poweruHzem.freq;src.varfloatb_numaxLower confidence level (16%) of numax (numax_16)uHzstat.fit.param;phys.atmol.levelfloatB_numaxUpper confidence level (16%) of numax (numax_84)uHzstat.fit.param;phys.atmol.levelfloatPast[yes/no ] Member, this work (astero_member)meta.code.membercharPS11[yes/no ] Member, Stello et al, 2011ApJ...739...13S (S11_member)meta.code.membercharPG20[0/1]? Member, Cantat-Gaudin & Anters, 2020A&A...633A..99C, Cat. J/A+A/633/A99 (prob_CG20)stat.fit.goodnessfloatnullableLCShow the light curvemeta.ref.urlcharFileNameName of the fits light curve file in subdirectory fitsmeta.id;meta.fitschar