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dc.contributor.author Palma, Tali
dc.contributor.author Minniti, Dante
dc.contributor.author Dékány, I.
dc.contributor.author Clariá, Juan José
dc.contributor.author Alonso García, J.
dc.contributor.author Gramajo, Luciana Veronica
dc.contributor.author Ramírez Alegría, S.
dc.contributor.author Bonatto, C.
dc.date.available 2019-03-22T17:19:37Z
dc.date.issued 2016-11
dc.identifier.citation Palma, Tali; Minniti, Dante; Dékány, I.; Clariá, Juan José; Alonso García, J.; et al.; New variable stars discovered in the fields of three Galactic open clusters using the VVV survey; Elsevier Science; New Astronomy; 49; 11-2016; 50-62
dc.identifier.issn 1384-1076
dc.identifier.uri http://hdl.handle.net/11336/72310
dc.description.abstract This project is a massive near-infrared (NIR) search for variable stars in highly reddened and obscured open cluster (OC) fields projected on regions of the Galactic bulge and disk. The search is performed using photometric NIR data in the J-, H- and Ks- bands obtained from the Vista Variables in the Vía Láctea (VVV) Survey. We performed in each cluster field a variability search using Stetson's variability statistics to select the variable candidates. Later, those candidates were subjected to a frequency analysis using the Generalized Lomb-Scargle and the Phase Dispersion Minimization algorithms. The number of independent observations range between 63 and 73. The newly discovered variables in this study, 157 in total in three different known OCs, are classified based on their light curve shapes, periods, amplitudes and their location in the corresponding color-magnitude (J−Ks,Ks) and color-color (H−Ks,J−H) diagrams. We found 5 possible Cepheid stars which, based on the period-luminosity relation, are very likely type II Cepheids located behind the bulge. Among the newly discovered variables, there are eclipsing binaries, δ Scuti, as well as background RR Lyrae stars. Using the new version of the Wilson & Devinney code as well as the “Physics Of Eclipsing Binaries” (PHOEBE) code, we analyzed some of the best eclipsing binaries we discovered. Our results show that these studied systems turn out to be ranging from detached to double-contact binaries, with low eccentricities and high inclinations of approximately 80°. Their surface temperatures range between 3500 K and 8000 K.
dc.format application/pdf
dc.language.iso eng
dc.publisher Elsevier Science
dc.rights info:eu-repo/semantics/restrictedAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject ANTALOVA 1
dc.subject ASCC 90
dc.subject ESO 393-15 – STARS
dc.subject GALAXY
dc.subject GENERAL
dc.subject INDIVIDUAL
dc.subject STELLAR CONTENT – OPEN CLUSTERS AND ASSOCIATIONS
dc.subject VARIABLES
dc.subject.classification Astronomía
dc.subject.classification Ciencias Físicas
dc.subject.classification CIENCIAS NATURALES Y EXACTAS
dc.title New variable stars discovered in the fields of three Galactic open clusters using the VVV survey
dc.type info:eu-repo/semantics/article
dc.type info:ar-repo/semantics/artículo
dc.type info:eu-repo/semantics/publishedVersion
dc.date.updated 2019-03-21T14:10:33Z
dc.journal.volume 49
dc.journal.pagination 50-62
dc.journal.pais Países Bajos
dc.journal.ciudad Amsterdam
dc.description.fil Fil: Palma, Tali. Millennium Institute of Astrophysics; Chile. Universidad Andrés Bello; Chile
dc.description.fil Fil: Minniti, Dante. Millennium Institute of Astrophysics; Chile. Universidad Andrés Bello; Chile
dc.description.fil Fil: Dékány, I.. Millennium Institute of Astrophysics; Chile. Pontificia Universidad Católica de Chile; Chile
dc.description.fil Fil: Clariá, Juan José. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina
dc.description.fil Fil: Alonso García, J.. Millennium Institute of Astrophysics; Chile. Universidad de Antofagasta; Chile
dc.description.fil Fil: Gramajo, Luciana Veronica. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina
dc.description.fil Fil: Ramírez Alegría, S.. Millennium Institute of Astrophysics; Chile. Universidad de Valparaíso; Chile
dc.description.fil Fil: Bonatto, C.. Universidade Federal do Rio Grande do Sul; Brasil
dc.journal.title New Astronomy
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/arxiv/https://arxiv.org/abs/1606.05028
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S138410761630032X
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1016/j.newast.2016.05.008
dc.conicet.fuente Elsevier


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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)