J/A+A/709/A186ivo://CDS.VizieR/J/A+A/709/A186CDSLoriga M.Cadelano M.Pallanca C.Ferraro F.R.Lanzoni B.Chiappino L.,Crociati C.Dalessandro E.Giusti C.Leanza S.Massari D.Origlia L.,Vesperini E.2026-05-20T07:06:12Z2026-05-20T08:04:48ZCDS support team

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

cds-question@unistra.frmilky-way-galaxyglobular-star-clustersinfrared-photometryIn this paper, we present the results of a detailed photometric analysis of Glimpse-C02, one of the most extincted globular clusters of the Milky Way. We built a deep color magnitude diagram spanning ~10 magnitudes and enabling the very first identification of the main sequence turnoff of the cluster. Due to the extreme reddening conditions of the region where the stellar system is located, a differential reddening correction was necessary. The resulting reddening map shows color excess variations up to {delta}E(B-V)~2.5mag in the direction of the target. From isochrone-fitting of the differential reddening corrected color-magnitude diagram, we obtained a new estimate of the mean color excess, E(B-V)=6.33^+0.05^_-0.04_, and a distance modulus (m-M)_0_=14.00^+0.26^_-0.11_, corresponding to a distance of d=6.3^+0.8^_-0.3_kpc from the Sun, and a Galactocentric distance of 2.6^+0.6^_-0.7_kpc. This distance value, within the associated uncertainties, suggests that the cluster may be located closer to the Galactic Center compared to previous estimates, possibly supporting its classification as a bulge globular cluster. Furthermore, we obtained a photometric metallicity estimate of [Fe/H]=-0.30^+0.10^_-0.08_ and the first absolute age determination for Glimpse-C02, resulting in t=11.9^+0.7^_-0.6_Gyr, as typically measured for Galactic globular clusters at this metallicity. We also obtained a new estimate of the center of gravity of the cluster and determined its projected density profile from resolved star counts, finding a high King concentration parameter (c=1.97_-0.67_^+0.51^) and a core radius r_c_=8.72^+0.40^_-0.35_arcsec. Finally, from the surface brightness profile of the system, we derived an integrated H-band magnitude M_H_=-7.9, corresponding to a mass of M=3.57^+0.22^_-0.19_x10^4^M_{sun}_. Thus, our work classifies Glimpse-C02 as an old and metal-rich globular cluster that is in an advanced stage of its dynamical evolution.2026A&A...709A.186Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/709/A186CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/489/583 : JHKs photometry of GLIMPSE-C02 (Kurtev+, 2008)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/709/A186https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/709/A186http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/709/A186https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/709/A186https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/709/A186http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/709/A186GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/709/A186/catalog (Catalog of the globular cluster Glimpse-C02)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/709/A186/catalog?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/709/A186/catalog?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/709/A186/catalog?GETtext/xml+votable180.050000true274.638081-16.9907670.0055555555555555566/29113https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/709/A186?format=asciiInfrareddefaultJ/A+A/709/A186/catalogCatalog of the globular cluster Glimpse-C02recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[1/23100] Star IDmeta.id;meta.mainintXposX coordinatepixpos.cartesian.x;instr.detdoubleYposY coordinatepixpos.cartesian.y;instr.detfloatRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainindexedDEJ2000Declination (J2000)degpos.eq.dec;meta.mainindexedF160W? Magnitude in F160W filtermagphot.mag;em.IR.Hfloatnullablee_F160W? Uncertainty on the F160W magnitudemagstat.errorfloatnullablechF160W? Chi parameter in F160W filterstat.fit.chi2floatnullableshF160W? Sharpness parameter in F160W filterstat.paramfloatnullablerdF160W? Roundness parameter in F160W filterstat.fit.paramfloatnullableF110W? Magnitude in F110W filtermagphot.mag;em.IR.Jfloatnullablee_F110W? Uncertainty on the F110W magnitudemagstat.errorfloatnullablechF110W? Chi parameter in F110W filterstat.fit.chi2floatnullableshF110W? Sharpness parameter in F110W filterstat.paramfloatnullablerdF110W? Roundness parameter in F110W filterstat.fit.paramfloatnullabledE(B-V)Differential reddening dE(B-V) valuemagphot.color.excessfloat