J/other/NatAs/3.ivo://CDS.VizieR/J/other/NatAs/3.667doi:10.26093/cds/vizier/dt/dkgghCDSIbata R.A.Bellazzini M.Malhan K.Martin N.Bianchini P.2026-03-04T20:03:03Z2023-08-30T16:36:21ZCDS support team

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

cds-question@unistra.frmilky-way-galaxyglobular-star-clustersvisible-astronomyOmega Centauri (omega Cen) is the Milky Way's most massive globular cluster, and has long been suspected of being the remnant core of an accreted dwarf galaxy. If this scenario is correct, omega Cen should be tidally limited and tidal debris should be spread along its orbit. Here we use N-body simulations to show that the recently discovered "Fimbulthul" structure is the long-sought-for tidal stream of omega Cen, extending up to 28{deg} from the cluster. Follow-up high-resolution spectroscopy of five stream stars shows that they are closely grouped in velocity, and have metallicities consistent with having originated in that cluster. Informed by our N-body simulations, we devise a selection filter that we apply to Gaia mission data to also uncover the stream in the highly contaminated and crowded field within 10{deg} of omega Cen. Further modelling of the stream may help to constrain the dynamical history of the dwarf galaxy progenitor of this disrupting system and guide future searches for its remnant stars in the Milky Way.2019NatAs...3..667Ihttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/other/NatAs/3.667CatalogResearchIsServedByTAP 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/other/NatAs/3.667https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/other/NatAs/3.667http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/other/NatAs/3.667https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/other/NatAs/3.667https://vizier.iucaa.in/viz-bin/votable?-source=J/other/NatAs/3.667http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/other/NatAs/3.667GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/other/NatAs/3.667/tables1 (Candidate members of the Fimbulthul stellar stream)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/other/NatAs/3.667/tables1?https://vizier.iucaa.in/viz-bin/conesearch/J/other/NatAs/3.667/tables1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/other/NatAs/3.667/tables1?GETtext/xml+votable180.050000true200.478245-25.511713060.0055555555555555564/2749 5/10982 10995 11000-11001 11004 11150 11168 11170 6/43899 43901-43903 43920 43922 43927 43933-43935 43953-43954 43956-43957 43959 43970-43971 43974-43975 43977-43979 44012 44020-44021 44023 44556 44570-44571 44577-44580 44582 44585-44589 44591-44592 44594 44676 44678-44679 44684-44685 446881.9867573869263685e-19 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/other/NatAs/3.667?format=asciiOpticaldefaultJ/other/NatAs/3.667/tables1Candidate members of the Fimbulthul stellar streamrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainpmRAGaia proper motion along RA, pmRA*cosDEmas/yrpos.pm;pos.eq.rafloate_pmRAGaia proper motion along RA errormas/yrstat.error;pos.pm;pos.eq.rafloatpmDEGaia proper motion along DEmas/yrpos.pm;pos.eq.decfloate_pmDEGaia proper motion along DE errormas/yrstat.error;pos.pm;pos.eq.decfloatplxGaia parallaxmaspos.parallax.trigfloate_plxGaia parallax errormasstat.error;pos.parallaxfloatG0magDerredened Gaia G magnitudemagphot.mag;em.optfloat(BP-RP)0Derredened Gaia BP-RP colour indexmagphot.color;em.opt.B;em.opt.RfloatSimbadNameSimbad column added by the CDSmeta.idcharnullable