FSR 1716: A New Milky Way Globular Cluster Confirmed Using VVV RR Lyrae Stars

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dc.contributor.authorMinniti, Dante
dc.contributor.authorPalma, Tali
dc.contributor.authorDékány, Istvan
dc.contributor.authorHempel, Maren
dc.contributor.authorRejkuba, Marina
dc.contributor.authorPullen, Joyce
dc.contributor.authorAlonso-García, Javier
dc.contributor.authorBarbá, Rodolfo
dc.contributor.authorBarbuy, Beatriz
dc.contributor.authorBica, Eduardo
dc.contributor.authorBonatto, Charles
dc.contributor.authorBorissova, Jura
dc.contributor.authorCatelan, Marcio
dc.contributor.authorCarballo-Bello, Julio A.
dc.contributor.authorChene, Andre Nicolas
dc.contributor.authorClariá, Juan José
dc.contributor.authorCohen, Roger E.
dc.contributor.authorContreras Ramos, Rodrigo
dc.contributor.authorDias, Bruno
dc.contributor.authorEmerson, Jim
dc.contributor.authorFroebrich, Dirk
dc.contributor.authorBuckner, Anne S. M.
dc.contributor.authorGeisler, Douglas
dc.contributor.authorGonzalez, Oscar A.
dc.contributor.authorGran, Felipe
dc.contributor.authorHagdu, Gergely
dc.contributor.authorIrwin, Mike
dc.contributor.authorIvanov, Valentin D.
dc.contributor.authorKurtev, Radostin
dc.contributor.authorLucas, Philip W.
dc.contributor.authorMajaess, Daniel
dc.contributor.authorMauro, Francesco
dc.contributor.authorMoni-Bidin, Christian
dc.contributor.authorNavarrete, Camila
dc.contributor.authorAlegría, Sebastian Ramírez
dc.contributor.authorSaito, Roberto K.
dc.contributor.authorValenti, Elena
dc.contributor.authorZoccali, Manuela
dc.date.accessioned2024-06-26T16:17:06Z
dc.date.available2024-06-26T16:17:06Z
dc.date.issued2017-03
dc.descriptionIndexación: Scopus
dc.description.abstractWe use deep multi-epoch near-IR images of the VISTA Variables in the Vía Láctea (VVV) Survey to search for RR Lyrae stars toward the Southern Galactic plane. Here, we report the discovery of a group of RR Lyrae stars close together in VVV tile d025. Inspection of the VVV images and PSF photometry reveals that most of these stars are likely to belong to a globular cluster that matches the position of the previously known star cluster FSR 1716. The stellar density map of the field yields a >100σ detection for this candidate globular cluster that is centered at equatorial coordinates R.A.J2000 = 16:10:30.0, decl.J2000 = -53:44:56 and galactic coordinates l = 329.77812, b = -1.59227. The color-magnitude diagram of this object reveals a well-populated red giant branch, with a prominent red clump at K s = 13.35 ±0.05, and J - K s = 1.30 ±0.05. We present the cluster RR Lyrae positions, magnitudes, colors, periods, and amplitudes. The presence of RR Lyrae indicates an old globular cluster, with an age >10 Gyr. We classify this object as an Oosterhoff type I globular cluster, based on the mean period of its RR Lyrae type ab, days, and argue that this is a relatively metal-poor cluster with [Fe/H] = -1.5 ±0.4 dex. The mean extinction and reddening for this cluster are and E(J - K s) = 0.72 ±0.02 mag, respectively, as measured from the RR Lyrae colors and the near-IR color-magnitude diagram. We also measure the cluster distance using the RR Lyrae type ab stars. The cluster mean distance modulus is (m - M)0 = 14.38 ±0.03 mag, implying a distance D = 7.5 ±0.2 kpc and a Galactocentric distance R G = 4.3 kpc. © 2017. The American Astronomical Society. All rights reserved.
dc.description.urihttps://iopscience-iop-org.recursosbiblioteca.unab.cl/article/10.3847/2041-8213/838/1/L14
dc.identifier.citationAstrophysical Journal Letters Volume 838, Issue 120 March 2017 Article number L14
dc.identifier.doi10.3847/2041-8213/838/1/L14
dc.identifier.issn2041-8205
dc.identifier.urihttps://repositorio.unab.cl/handle/ria/57990
dc.language.isoen
dc.publisherInstitute of Physics Publishing
dc.rights.licenseATRIBUCIÓN 4.0 INTERNACIONAL CC BY 4.0 Deed
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/deed.es
dc.subjectgalaxies: photometry
dc.subjectglobular clusters: general
dc.subjectstars: variables: RR Lyrae
dc.titleFSR 1716: A New Milky Way Globular Cluster Confirmed Using VVV RR Lyrae Stars
dc.typeArtículo
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