Spectroscopic analysis of VVV CL001 cluster with MUSE

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dc.contributor.authorOlivares Carvajal, J.
dc.contributor.authorZoccali, M.
dc.contributor.authorRojas-Arriagada, A.
dc.contributor.authorContreras Ramos, R.
dc.contributor.authorGran, F.
dc.contributor.authorValenti, E.
dc.contributor.authorMinniti, J. H.
dc.date.accessioned2025-01-20T21:07:32Z
dc.date.available2025-01-20T21:07:32Z
dc.date.issued2022
dc.description.abstractLike most spiral galaxies, the Milky Way contains a population of blue, metal-poor globular clusters and another of red, metal-rich ones. Most of the latter belong to the bulge, and therefore they are poorly studied compared to the blue (halo) ones because they suffer higher extinction and larger contamination from field stars. These intrinsic difficulties, together with a lack of low-mass bulge globular clusters, are reasons to believe that their census is not complete yet. Indeed, a few new clusters have been confirmed in the last few years. One of them is VVV CL001, the subject of the present study. We present a new spectroscopic analysis of the recently confirmed globular cluster VVV CL001, made by means of MUSE@VLT integral field data. Individual spectra were extracted for stars in the VVV CL001 field. Radial velocities were derived by cross-correlation with synthetic templates. Coupled with proper motions from the VVV (VISTA Variables in the Via Lactea) survey, these data allow us to select 55 potential cluster members, for which we derive metallicities using the public code The Cannon. The mean radial velocity of the cluster is V-helio = -324.9 +/- 0.8 km s(-1), as estimated from 55 cluster members. This high velocity, together with a low metallicity [Fe/H] = -2.04 +/- 0.02 dex, suggests that VVV CL001 could be a very old cluster. The estimated distance is d = 8.23 +/- 0.46 kpc, placing the cluster in the Galactic bulge. Furthermore, both its current position and the orbital parameters suggest that VVV CL001 is most probably a bulge globular cluster.
dc.fuente.origenWOS
dc.identifier.doi10.1093/mnras/stac934
dc.identifier.eissn1365-2966
dc.identifier.issn0035-8711
dc.identifier.urihttps://doi.org/10.1093/mnras/stac934
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/93420
dc.identifier.wosidWOS:000795207300014
dc.issue.numero3
dc.language.isoen
dc.pagina.final4003
dc.pagina.inicio3993
dc.revistaMonthly notices of the royal astronomical society
dc.rightsacceso restringido
dc.subjectsurveys
dc.subjectproper motions
dc.subjectstars: abundances
dc.subjectGalaxy: bulge
dc.subjectglobular clusters: individual: VVV CL001
dc.titleSpectroscopic analysis of VVV CL001 cluster with MUSE
dc.typeartículo
dc.volumen513
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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