J/A+A/707/A86ivo://CDS.VizieR/J/A+A/707/A86CDSZiliotto T.Milone A.P.Cordoni G.Marino A.F.Legnardi M.V.,Dondoglio E.Bortolan E.Muratore F.2026-03-10T11:21:34Z2026-03-10T12:20:38ZCDS support team

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

cds-question@unistra.frglobular-star-clusterspopulation-ii-starshst-photometryinfrared-photometryproper-motionsWe combine F115W and F277W images collected with the Near Infrared Camera of the James Webb Space Telescope with multiband, multi-epoch Hubble Space Telescope observations of omega Centauri to investigate its multiple stellar populations and internal kinematics. Our study focuses on a region spanning about 0.9 to 2.3 half-light radii from the cluster center, which is largely unexplored by these telescopes. Using chromosome maps, we identified the principal populations along the upper main sequence and among M dwarfs, distinguishing lower-stream stars chemically akin to first-generation globular cluster stars with similar metallicities from upper-stream stars enriched in helium and nitrogen but oxygen poor. Both streams also host subpopulations with varying metallicities. We found radially anisotropic motions, with upper-stream stars exhibiting significantly stronger anisotropy than lower-stream stars. Subdividing the upper stream into extreme and intermediate light-element populations revealed a gradient in anisotropy, with intermediate stars lying between the lower-stream stars and extreme upper-stream populations. However, metal-rich and metal-poor stars within each stream show moderate kinematic differences. The lower-stream stars show a higher angular momentum dispersion compared to upper-stream stars, and they also exhibit stronger systemic rotation and proper motion skewness, further highlighting their kinematic divergence. Finally, leveraging a mass range of about 0.15 to 0.7 solar masses, we detected a low degree of energy equipartition for all cluster stars, which decreases with radial distance from the cluster center.2026A&A...707A..86Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/707/A86CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/707/A86https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/707/A86http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/707/A86https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/707/A86https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/707/A86http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/707/A86GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/707/A86/photcat (Main catalog of photometry and proper motions)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/707/A86/photcat?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/707/A86/photcat?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/707/A86/photcat?GETtext/xml+votable180.050000true201.49905806-47.5933050.005555555555555556Cone search capability for table J/A+A/707/A86/chmlowms (Chromosome map indices for lower-MS stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/707/A86/chmlowms?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/707/A86/chmlowms?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/707/A86/chmlowms?GETtext/xml+votable180.050000true201.5185948106-47.62582699860.005555555555555556Cone search capability for table J/A+A/707/A86/chmupms (Chromosome map indices for upper-MS stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/707/A86/chmupms?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/707/A86/chmupms?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/707/A86/chmupms?GETtext/xml+votable180.050000true201.5228004529-47.63127717840.0055555555555555566/432272.0401237512456292e-19 7.605786964834612e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/707/A86?format=asciiInfrareddefaultJ/A+A/707/A86/photcatMain catalog of photometry and proper motionsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintF277W? Magnitude in JWST F277W filtermagphot.mag;em.IR.Kdoublenullablee_F277W? RMS uncertainty in F277W magnitudemagstat.errordoublenullableo_F277W? Number of measurements in F277Wmeta.numberintnullableF115W? Magnitude in JWST F115W filtermagphot.mag;em.IR.Jdoublenullablee_F115W? RMS uncertainty in F115W magnitudemagstat.errordoublenullableo_F115W? Number of measurements in F115Wmeta.numberintnullableF814W? Magnitude in HST F814W filtermagphot.mag;em.opt.Idoublenullablee_F814W? RMS uncertainty in F814W magnitudemagstat.errordoublenullableo_F814W? Number of measurements in F814Wmeta.numberintnullableF475W? Magnitude in HST F475W filtermagphot.mag;em.opt.Bdoublenullablee_F475W? RMS uncertainty in F475W magnitudemagstat.errordoublenullableo_F475W? Number of measurements in F475Wmeta.numberintnullableF438W? Magnitude in HST F438W filtermagphot.mag;em.opt.Vdoublenullablee_F438W? RMS uncertainty in F438W magnitudemagstat.errordoublenullableo_F438W? Number of measurements in F438Wmeta.numberintnullableF336W? Magnitude in HST F336W filtermagphot.mag;em.opt.Udoublenullablee_F336W? RMS uncertainty in F336W magnitudemagstat.errordoublenullableo_F336W? Number of measurements in F336Wmeta.numberintnullableF275W? Magnitude in HST F275W filtermagphot.mag;em.UV.200-300nmdoublenullablee_F275W? RMS uncertainty in F275W magnitudemagstat.errordoublenullableo_F275W? Number of measurements in F275Wmeta.numberintnullabledE(B-V)Differential reddening correction applied to each starmagphot.mag;arith.diffdoubleRA_ICRSRight ascension (ICRS) at Ep=2000degpos.eq.ra;meta.mainindexedDE_ICRSDeclination (ICRS) at Ep=2000degpos.eq.dec;meta.mainindexedpmX? Proper motion in X directionmas/yrpos.pm;pos.dirCosdoublenullablee_pmX? Uncertainty in pmxmas/yrstat.errordoublenullablepmY? Proper motion in Y directionmas/yrpos.pm;pos.dirCosdoublenullablee_pmY? Uncertainty in pmymas/yrstat.errordoublenullableo_pmNumber of epochs used for PMmeta.numberintTimeBaseTime baseline of PM measurementyrtime.intervaldoubleindexedJ/A+A/707/A86/chmlowmsChromosome map indices for lower-MS starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRA_ICRSRight ascension (ICRS) at Ep=2000degpos.eq.ra;meta.mainDE_ICRSDeclination (ICRS) at Ep=2000degpos.eq.dec;meta.mainF475W-F814WColor index F475W-F814Wmagphot.color;em.opt;em.optdoubleF115W-F277WColor index F115W-F277Wmagphot.color;em.IR;em.IRdoubleJ/A+A/707/A86/chmupmsChromosome map indices for upper-MS starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRA_ICRSRight ascension (ICRS) at Ep=2000degpos.eq.ra;meta.mainDE_ICRSDeclination (ICRS) at Ep=2000degpos.eq.dec;meta.mainF475W-F814WColor index F475W-F814Wmagphot.color;em.opt;em.optdoubleF115W-F277WColor index F115W-F277Wmagphot.color;em.IR;em.IRdouble