J/A+A/681/A13ivo://CDS.VizieR/J/A+A/681/A13doi:10.26093/cds/vizier/bc-n9/lbdCDSFritzewski D.J.Van Reeth T.Aerts C.Van Beeck J.Gossage S.Li G.2026-07-03T06:35:49Z2024-01-05T12:03:40ZCDS support team

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

cds-question@unistra.fropen-star-clusterslate-type-starsvariable-starsphotometryvisible-astronomyUBC 1 is an open cluster discovered in Gaia data and located near the edge of the Transiting Exoplanet Survey Satellite's (TESS) continuous viewing zone. We aim to provide age constraints for this poorly studied open cluster from the combination of gravity-mode (g-mode) asteroseismology, gyrochronology, and isochrone fitting. We established the members of UBC 1 from a spatial-kinematic filtering and estimate the cluster age and its parameters. Firstly, we fitted rotating isochrones to the single star cluster sequence. Secondly, using TESS time-series photometry, we explored the variability of the upper main sequence members and identified potential g-mode pulsators. For one star, we found a clear period spacing pattern that we used to deduce the buoyancy travel time, the near-core rotation rate, and an asteroseismic age. For a third independent age estimate, we employed the rotation periods of low-mass members of UBC 1. Based on isochrone fitting, we find logt=8.1+/-0.4, where the large uncertainty occurs because UBC 1 does not host evolved stars. From asteroseismology of one g-mode pulsator, we find a constrained age of logt=8.24_-0.14_^+0.43^. From gyrochronology based on 17 cool star cluster members, we estimate logt=8.35_-0.25_^+0.16^. Combined, all three methods lead to a consistent age in the range of 150~300Myr. Our results show that even a single cluster member with identified g modes can improve age-dating of young open clusters. Combining the gyrochronology of low-mass members with asteroseismology of intermediate-mass members is a powerful tool for young open cluster modelling, including high-precision age-dating.2024A&A...681A..13Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/681/A13CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/681/A13https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/681/A13http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/681/A13https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/681/A13https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/681/A13http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/681/A13GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/681/A13/table1 (List of cluster members of UBC1)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/681/A13/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/681/A13/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/681/A13/table1?GETtext/xml+votable180.050000true284.7829256.738130.005555555555555556Cone search capability for table J/A+A/681/A13/table2 (Rotation periods for cool star cluster members)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/681/A13/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/681/A13/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/681/A13/table2?GETtext/xml+votable180.050000true285.8890856.625040.0055555555555555565/3803 3806 6/14835 15194 15204 15209 15211 15217-15218 15228-15230 15297 15300-15301 15912 15915https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/681/A13?format=asciiOpticaldefaultJ/A+A/681/A13/table1List of cluster members of UBC1SimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintprotindicates rotation period in table2meta.ref.urlcharIDID number used in papermeta.idintprimaryGaiaDR3Gaia DR3 designation (Cat. I/355)meta.id;meta.mainRA_ICRSRight ascension from Gaia DR3 (ICRS) at Ep=2016.0 (Cat. I/355)degpos.eq.ra;meta.mainDE_ICRSDeclination from Gaia DR3 (ICRS) at Ep=2016.0 (Cat. I/355)degpos.eq.dec;meta.mainsigma2D2D velocity dispersion with respect to the cluster mean motionkm/sphys.veloc.dispersionfloatsigma3D? 3D velocity dispersion with respect to the cluster mean motionkm/sphys.veloc.dispersionfloatnullableplxParallax from Gaia DR3 (Cat. I/355)maspos.parallax.trigfloatJ/A+A/681/A13/table2Rotation periods for cool star cluster membersProtRotation perioddtime.periodfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDID number from members tablemeta.idintRA_ICRSRight ascension from Gaia DR3 (ICRS) at Ep=2016.0 (Cat. I/355)degpos.eq.ra;meta.mainDE_ICRSDeclination from Gaia DR3 (ICRS) at Ep=2016.0 (Cat. I/355)degpos.eq.dec;meta.main