S316p.48 — Variable Stars in VVV Globular Clusters

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Aug 10th at 6:00 PM until 7:30 PM

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Author(s): Rodrigo Contreras Ramos2, Javier Alonso-Garcia2, Dante Minniti1, Márcio Catelan2, Manuela Zoccali2, Felipe Gran2, Istvan Dekany2

Institution(s): 1. Millennium institute of Astrophysics, 2. Pontificia Universidad Católica de Chile

The Vista Variables in the Via Lactea (VVV) is an ongoing variability survey observing the central regions of our Galaxy in the near-infrared by means of the VISTA telescope. Numerous (36) inner Galactic globular clusters fall inside the area covered by the VVV survey. Most of these clusters, especially the faintest ones, have been poorly studied in the past due to the difficulties caused by the presence of an elevated extinction and high field stellar densities in their lines of sight. We will present the first results of a search for variable stars we are conducting in some of these clusters. Our main aim is to obtain a better determination of the physical parameters of these globular clusters and put constrains on the formation scenario of our galaxy using the information provided by their variables stars.