J/ApJ/889/99ivo://CDS.VizieR/J/ApJ/889/99doi:10.26093/cds/vizier.18890099CDSZhang Y.Tang S.-Y.Chen W.P.Pang X.Liu J.Z.2022-12-09T09:52:01Z2020-02-26T06:38:03ZCDS support team

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

cds-question@unistra.fropen-star-clustersstellar-populationsvisible-astronomytrigonometric-parallaxproper-motionsradial-velocityWe present the stellar population, using Gaia DR2 parallax, kinematics, and photometry, of the young (~100Myr), nearby (~230pc) open cluster, Blanco 1. A total of 644 member candidates are identified via the unsupervised machine learning method StarGO to find the clustering in the 5-dimensional position and proper motion parameter (X, Y, Z, {mu}{alpha}*cos{delta}, {mu}{delta}) space. Within the tidal radius of 10.0+/-0.3pc, there are 488 member candidates, 3 times more than those outside. A leading tail and a trailing tail, each of 50-60pc in the Galactic plane, are found for the first time for this cluster, with stars further from the cluster center streaming away faster, manifest stellar stripping. Blanco 1 has a total detected mass of 285+/-32M_{sun}_ with a mass function consistent with a slope of alpha=1.35+/-0.2 in the sense of dN/dm{prop.to}m^-alpha^, in the mass range of 0.25-2.51M_{sun}_, where N is the number of members and $m$ is stellar mass. A Minimum Spanning Tree ({LAMBDA}_MSR_) analysis shows the cluster to be moderately mass segregated among the most massive members (>~1.4M_{sun}_), suggesting an early stage of dynamical disintegration.2020ApJ...889...99Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/889/99CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)J/A+A/601/A19 : Gaia DR1 open cluster members (Gaia Collaboration+, 2017)J/MNRAS/413/1024 : Deep proper-motion survey of Blanco 1 (Platais+, 2011)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/889/99https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/889/99http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/889/99https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/889/99https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/889/99http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/889/99GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/889/99/table1 (Gaia DR2 Blanco 1 member candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/889/99/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/889/99/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/889/99/table1?GETtext/xml+votable180.050000true0.01725-29.001728890.0055555555555555565/4111 4113 4120 4122 4135 4144 4228 8891 8894 6/16400 16404 16406 16411 16415 16422 16435 16437 16439 16443 16449-16450 16456 16459-16462 16464-16465 16472 16476 16486-16487 16492 16494 16496-16497 16508 16526 16531-16533 16535-16536 16538 16544 16546 16553 16560 16565-16566 16568 16571-16573 16580 16582 16584-16586 16593 16608 16611 16614 16616 16627 16635 16901 16918 16921-16923 16925-16927 16933 16936 16947 16949-16950 16952 16960 16963 16968 35510-35511 35517 35519 35528 35530 35535 35538-35539 35544 35552-35553 35556-35557 35561 35568 35571 465801.9867573869263685e-19 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/889/99?format=asciiOpticaldefaultJ/ApJ/889/99/table1Gaia DR2 Blanco 1 member candidatesSimbadNameSimbad column added by the CDSmeta.idcharnullableSeqInternal index number (1)meta.id;meta.maininte_pmDEUncertainty in pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatGmagApparent Gaia broad G band magnitudemagphot.mag;em.optfloatf_Seq[bt] Flag on Seq (2)meta.codecharGaiaDR2Display the Gaia DR2 data (Gaia collaboration, 2018, Cat. I/345)meta.ref.urlchare_RV? Uncertainty in RVkm/sstat.errorfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRA_ICRSRight Ascension (ICRS) at Ep=J2015.5degpos.eq.ra;meta.mainDE_ICRSDeclination (ICRS) at Ep=J2015.5degpos.eq.dec;meta.mainplxParallaxmaspos.parallax.trigfloate_plxUncertainty in plxmasstat.error;pos.parallaxfloatpmRA*Proper motion in RA*cos(DE)mas/yrpos.pm;pos.eq.rafloate_pmRA*Uncertainty in pmRA*mas/yrstat.error;pos.pm;pos.eq.rafloatpmDEProper motion in DEmas/yrpos.pm;pos.eq.decfloat_RA.icrsRight ascension (ICRS) at Epoch=J2000, proper motions taken into accountdegpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) at Epoch=J2000, proper motions taken into accountdegpos.eq.decnullableindexedRV? Radial velocitykm/sphys.veloc;pos.heliocentricfloatnullable