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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
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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&Nbsp;1
dc.subject
Ascc&Nbsp;90
dc.subject
Eso&Nbsp;393-15 &Ndash; Stars
dc.subject
Galaxy
dc.subject
General
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Individual
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Stellar Content &Ndash; Open Clusters And Associations
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Variables
dc.subject.classification
Astronomía
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Ciencias Físicas
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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
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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


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