New variable stars discovered in the fields of three Galactic open clusters using the VVV survey

Autores
Palma, Tali; Minniti, Dante; Dékány, I.; Clariá, Juan José; Alonso García, J.; Gramajo, Luciana Veronica; Ramírez Alegría, S.; Bonatto, C.
Año de publicación
2016
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
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.
Fil: Palma, Tali. Millennium Institute of Astrophysics; Chile. Universidad Andrés Bello; Chile
Fil: Minniti, Dante. Millennium Institute of Astrophysics; Chile. Universidad Andrés Bello; Chile
Fil: Dékány, I.. Millennium Institute of Astrophysics; Chile. Pontificia Universidad Católica de Chile; Chile
Fil: Clariá, Juan José. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina
Fil: Alonso García, J.. Millennium Institute of Astrophysics; Chile. Universidad de Antofagasta; Chile
Fil: Gramajo, Luciana Veronica. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina
Fil: Ramírez Alegría, S.. Millennium Institute of Astrophysics; Chile. Universidad de Valparaíso; Chile
Fil: Bonatto, C.. Universidade Federal do Rio Grande do Sul; Brasil
Materia
Antalova&Nbsp;1
Ascc&Nbsp;90
Eso&Nbsp;393-15 &Ndash; Stars
Galaxy
General
Individual
Stellar Content &Ndash; Open Clusters And Associations
Variables
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/72310
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/72310
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling New variable stars discovered in the fields of three Galactic open clusters using the VVV surveyPalma, TaliMinniti, DanteDékány, I.Clariá, Juan JoséAlonso García, J.Gramajo, Luciana VeronicaRamírez Alegría, S.Bonatto, C.Antalova&Nbsp;1Ascc&Nbsp;90Eso&Nbsp;393-15 &Ndash; StarsGalaxyGeneralIndividualStellar Content &Ndash; Open Clusters And AssociationsVariableshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1This 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.Fil: Palma, Tali. Millennium Institute of Astrophysics; Chile. Universidad Andrés Bello; ChileFil: Minniti, Dante. Millennium Institute of Astrophysics; Chile. Universidad Andrés Bello; ChileFil: Dékány, I.. Millennium Institute of Astrophysics; Chile. Pontificia Universidad Católica de Chile; ChileFil: Clariá, Juan José. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; ArgentinaFil: Alonso García, J.. Millennium Institute of Astrophysics; Chile. Universidad de Antofagasta; ChileFil: Gramajo, Luciana Veronica. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; ArgentinaFil: Ramírez Alegría, S.. Millennium Institute of Astrophysics; Chile. Universidad de Valparaíso; ChileFil: Bonatto, C.. Universidade Federal do Rio Grande do Sul; BrasilElsevier Science2016-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/72310Palma, 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; 50-621384-1076CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/arxiv/https://arxiv.org/abs/1606.05028info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S138410761630032Xinfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.newast.2016.05.008info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:42:43Zoai:ri.conicet.gov.ar:11336/72310instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-15 14:42:43.927CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv New variable stars discovered in the fields of three Galactic open clusters using the VVV survey
title New variable stars discovered in the fields of three Galactic open clusters using the VVV survey
spellingShingle New variable stars discovered in the fields of three Galactic open clusters using the VVV survey
Palma, Tali
Antalova&Nbsp;1
Ascc&Nbsp;90
Eso&Nbsp;393-15 &Ndash; Stars
Galaxy
General
Individual
Stellar Content &Ndash; Open Clusters And Associations
Variables
title_short New variable stars discovered in the fields of three Galactic open clusters using the VVV survey
title_full New variable stars discovered in the fields of three Galactic open clusters using the VVV survey
title_fullStr New variable stars discovered in the fields of three Galactic open clusters using the VVV survey
title_full_unstemmed New variable stars discovered in the fields of three Galactic open clusters using the VVV survey
title_sort New variable stars discovered in the fields of three Galactic open clusters using the VVV survey
dc.creator.none.fl_str_mv Palma, Tali
Minniti, Dante
Dékány, I.
Clariá, Juan José
Alonso García, J.
Gramajo, Luciana Veronica
Ramírez Alegría, S.
Bonatto, C.
author Palma, Tali
author_facet Palma, Tali
Minniti, Dante
Dékány, I.
Clariá, Juan José
Alonso García, J.
Gramajo, Luciana Veronica
Ramírez Alegría, S.
Bonatto, C.
author_role author
author2 Minniti, Dante
Dékány, I.
Clariá, Juan José
Alonso García, J.
Gramajo, Luciana Veronica
Ramírez Alegría, S.
Bonatto, C.
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Antalova&Nbsp;1
Ascc&Nbsp;90
Eso&Nbsp;393-15 &Ndash; Stars
Galaxy
General
Individual
Stellar Content &Ndash; Open Clusters And Associations
Variables
topic Antalova&Nbsp;1
Ascc&Nbsp;90
Eso&Nbsp;393-15 &Ndash; Stars
Galaxy
General
Individual
Stellar Content &Ndash; Open Clusters And Associations
Variables
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv 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.
Fil: Palma, Tali. Millennium Institute of Astrophysics; Chile. Universidad Andrés Bello; Chile
Fil: Minniti, Dante. Millennium Institute of Astrophysics; Chile. Universidad Andrés Bello; Chile
Fil: Dékány, I.. Millennium Institute of Astrophysics; Chile. Pontificia Universidad Católica de Chile; Chile
Fil: Clariá, Juan José. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina
Fil: Alonso García, J.. Millennium Institute of Astrophysics; Chile. Universidad de Antofagasta; Chile
Fil: Gramajo, Luciana Veronica. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina
Fil: Ramírez Alegría, S.. Millennium Institute of Astrophysics; Chile. Universidad de Valparaíso; Chile
Fil: Bonatto, C.. Universidade Federal do Rio Grande do Sul; Brasil
description 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.
publishDate 2016
dc.date.none.fl_str_mv 2016-11
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/72310
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
1384-1076
CONICET Digital
CONICET
url http://hdl.handle.net/11336/72310
identifier_str_mv 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
1384-1076
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/arxiv/https://arxiv.org/abs/1606.05028
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S138410761630032X
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.newast.2016.05.008
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.22299

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