Variable stars in the VVV globular clusters
1 Universidad de Antofagasta, Unidad de Astronomía, Avda. U. de Antofagasta 02800, Antofagasta, Chile
2 Millennium Institute of Astrophysics, Santiago, Chile
3 Pontificia Universidad Católica de Chile, Instituto de Astrofísica, Av. Vicuña Mackenna 4860, 782-0436 Macul, Santiago, Chile
4 Zentrum für Astronomie der Universität Heidelberg, Astronomisches Rechen-Institut, Mönchhofstr. 12-14, D-69120 Heidelberg, Germany
5 Universidad Andrés Bello, Departamento de Física, Av. Fernández Concha 700, Las Condes, Santiago, Chile
6 Vatican Observatory, V00120 Vatican City State, Italy
Published online: 8 September 2017
The VVV survey observed some of the most crowded and most obscured regions in the inner MilkyWay during the last years. A significant sample of the less known globular clusters in our galaxy lie there. Combining the high-resolution, wide-field, nearinfrared capabilities of the survey camera, the use of 5 different filters, and multi-epoch observations, we are able to overcome many of the previous challenges that prevented a proper study of these objects. Particularly, the identification of the RR Lyrae stars in these globular clusters is proving to be a fundamental tool to establish accurately their distances and reddenings, and to infer information about the Oosterhoff dichotomy that Galactic globular clusters seem to follow.
© The Authors, published by EDP Sciences, 2017
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