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dc.contributor.author
Alonso Garciá, Javier  
dc.contributor.author
Smith, Leigh C.  
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Catelan, Márcio  
dc.contributor.author
Minniti, Dante  
dc.contributor.author
Navarrete, Camila  
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Borissova, Jura  
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Carballo Bello, Julio A.  
dc.contributor.author
Contreras Ramos, Rodrigo  
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Fernández Trincado, José G.  
dc.contributor.author
Ferreira Lopes, Carlos E.  
dc.contributor.author
Gran, Felipe  
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Garro, Elisa R.  
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Geisler, Doug  
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Guo, Zhen  
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Hempel, Maren  
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Kerins, Eamonn  
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Lucas, Philip W.  
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Palma, Tali  
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Peña Ramírez, Karla  
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Ramírez Alegriá, Sebastián  
dc.contributor.author
Saito, Roberto  
dc.date.available
2022-06-01T02:47:53Z  
dc.date.issued
2021-07  
dc.identifier.citation
Alonso Garciá, Javier; Smith, Leigh C.; Catelan, Márcio; Minniti, Dante; Navarrete, Camila; et al.; Variable stars in the VVV globular clusters: II. NGC 6441, NGC 6569, NGC 6626 (M 28), NGC 6656 (M 22), 2MASS-GC 02, and Terzan 10; EDP Sciences; Astronomy and Astrophysics; 651; 7-2021; 1-18  
dc.identifier.issn
0004-6361  
dc.identifier.uri
http://hdl.handle.net/11336/158634  
dc.description.abstract
Context. The Galactic globular clusters (GGCs) located in the inner regions of the Milky Way suffer from high extinction that makes their observation challenging. High densities of field stars in their surroundings complicate their study even more. The VISTA Variables in the Via Lactea (VVV) survey provides a way to explore these GGCs in the near-infrared where extinction effects are highly diminished. Aims. We conduct a search for variable stars in several inner GGCs, taking advantage of the unique multi-epoch, wide-field, near-infrared photometry provided by the VVV survey. We are especially interested in detecting classical pulsators that will help us constrain the physical parameters of these GGCs. In this paper, the second of a series, we focus on NGC 6656 (M 22), NGC 6626 (M 28), NGC 6569, and NGC 6441; these four massive GGCs have known variable sources, but quite different metallicities. We also revisit 2MASS-GC 02 and Terzan 10, the two GGCs studied in the first paper of this series. Methods. We present an improved method and a new parameter that efficiently identify variable candidates in the GGCs. We also use the proper motions of those detected variable candidates and their positions in the sky and in the color-magnitude diagrams to assign membership to the GGCs. Results. We identify and parametrize in the near-infrared numerous variable sources in the studied GGCs, cataloging tens of previously undetected variable stars. We recover many known classical pulsators in these clusters, including the vast majority of their fundamental mode RR Lyrae. We use these pulsators to obtain distances and extinctions toward these objects. Recalibrated period-luminosity-metallicity relations for the RR Lyrae bring the distances to these GGCs to a closer agreement with those reported by Gaia, except for NGC 6441, which is an uncommon Oosterhoff III GGC. Recovered proper motions for these GGCs also agree with those reported by Gaia, except for 2MASS-GC 02, the most reddened GGC in our sample, where the VVV near-infrared measurements provide a more accurate determination of its proper motions.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
EDP Sciences  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by/2.5/ar/  
dc.subject
GLOBULAR CLUSTERS: GENERAL  
dc.subject
STARS: VARIABLES: GENERAL  
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STARS: VARIABLES: RR LYRAE  
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Astronomía  
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Ciencias Físicas  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
Variable stars in the VVV globular clusters: II. NGC 6441, NGC 6569, NGC 6626 (M 28), NGC 6656 (M 22), 2MASS-GC 02, and Terzan 10  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2022-02-22T15:53:17Z  
dc.identifier.eissn
1432-0746  
dc.journal.volume
651  
dc.journal.pagination
1-18  
dc.journal.pais
Francia  
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París  
dc.description.fil
Fil: Alonso Garciá, Javier. Universidad de Antofagasta; Chile. Millennium Institute of Astrophysics; Chile  
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Fil: Smith, Leigh C.. University of Cambridge; Reino Unido  
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Fil: Catelan, Márcio. Pontificia Universidad Católica de Chile; Chile. Millennium Institute of Astrophysics; Chile  
dc.description.fil
Fil: Minniti, Dante. Universidad Andrés Bello; Chile. Vatican Observatory; Italia  
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Fil: Navarrete, Camila. Millennium Institute of Astrophysics; Chile. European Southern Observatory Chile; Chile  
dc.description.fil
Fil: Borissova, Jura. Universidad de Valparaíso; Chile. Millennium Institute of Astrophysics; Chile  
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Fil: Carballo Bello, Julio A.. Universidad de Tarapaca.; Chile  
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Fil: Contreras Ramos, Rodrigo. Pontificia Universidad Católica de Chile; Chile. Millennium Institute of Astrophysics; Chile  
dc.description.fil
Fil: Fernández Trincado, José G.. Universidad de Atacama.; Chile  
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Fil: Ferreira Lopes, Carlos E.. Centro de Previsao de Tempo e Estudos Climáticos. Instituto Nacional de Pesquisas Espaciais; Brasil  
dc.description.fil
Fil: Gran, Felipe. Pontificia Universidad Católica de Chile; Chile. European Southern Observatory Chile; Chile. Millennium Institute of Astrophysics; Chile  
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Fil: Garro, Elisa R.. Universidad Andrés Bello; Chile  
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Fil: Geisler, Doug. Universidad de Concepción; Chile. Universidad de La Serena; Chile  
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Fil: Guo, Zhen. University Of Hertfordshire; Reino Unido  
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Fil: Hempel, Maren. Universidad Andrés Bello; Chile. Max-Planck-Institut für Astronomie; Alemania  
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Fil: Kerins, Eamonn. University of Manchester; Reino Unido  
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Fil: Lucas, Philip W.. University Of Hertfordshire; Reino Unido  
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Fil: Palma, Tali. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Departamento de Astrofísica Estelar; Argentina  
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Fil: Peña Ramírez, Karla. Universidad de Antofagasta; Chile  
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Fil: Ramírez Alegriá, Sebastián. Universidad de Antofagasta; Chile  
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Fil: Saito, Roberto. Universidade Federal de Santa Catarina; Brasil  
dc.journal.title
Astronomy and Astrophysics  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2021/07/aa40546-21/aa40546-21.html  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1051/0004-6361/202140546  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/2105.05825