Variability in NGC 3201 Giant Stars

Autores
Cortés, C. C.; Llancaqueo Albornoz, Á.; Villanova, S.; Ahumada, Javier Alejandro; Parisi, Maria Celeste
Año de publicación
2023
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We present the analysis of 510 light curves in V and I bands of 255 giant stars in the globular cluster NGC 3201.Our aim is to expand the sample of new types of variables reported in a previous study. These variables show ashort period (PV < 0.6 day) and a low amplitude (A(V ) < 0.06 mag.). We first searched for variability using thegeneralized Lomb?Scargle and phase dispersion minimization periodograms of the sample, discarding 167 stars asnon-variables. We then applied the significance test and reduced the sample to 88 giants, of which we classified 18as possible variables, 11 as dubious, 41 as non-variables, and 18 as variables. We finally determined the clustermembership of this sample and grouped each star based on their light-curve shape. The discovered variables showperiods in the range 0.2440 < PV < 0.5868 days and amplitudes between 0.010 < A(V ) < 0.064 mag. Within thesample of 18 variable stars, we report the discovery of an object with a period PV = 0.3603 ± 0.0012 and amplitudeA(V ) = 0.703 ± 0.029 mag that shows a RR Lyrae ab-type light curve. Additionally, we report two RR Lyrae aband c types with ultralow amplitude.
Fil: Cortés, C. C.. Universidad de Talca; Chile
Fil: Llancaqueo Albornoz, Á.. Universidad de Concepcion; Chile
Fil: Villanova, S.. Universidad de Concepcion; Chile
Fil: Ahumada, Javier Alejandro. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina
Fil: Parisi, Maria Celeste. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; Argentina
Materia
GLOBULAR STAR CLUSTERS
VARIABLE STARS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/248975
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Variability in NGC 3201 Giant StarsCortés, C. C.Llancaqueo Albornoz, Á.Villanova, S.Ahumada, Javier AlejandroParisi, Maria CelesteGLOBULAR STAR CLUSTERSVARIABLE STARShttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We present the analysis of 510 light curves in V and I bands of 255 giant stars in the globular cluster NGC 3201.Our aim is to expand the sample of new types of variables reported in a previous study. These variables show ashort period (PV < 0.6 day) and a low amplitude (A(V ) < 0.06 mag.). We first searched for variability using thegeneralized Lomb?Scargle and phase dispersion minimization periodograms of the sample, discarding 167 stars asnon-variables. We then applied the significance test and reduced the sample to 88 giants, of which we classified 18as possible variables, 11 as dubious, 41 as non-variables, and 18 as variables. We finally determined the clustermembership of this sample and grouped each star based on their light-curve shape. The discovered variables showperiods in the range 0.2440 < PV < 0.5868 days and amplitudes between 0.010 < A(V ) < 0.064 mag. Within thesample of 18 variable stars, we report the discovery of an object with a period PV = 0.3603 ± 0.0012 and amplitudeA(V ) = 0.703 ± 0.029 mag that shows a RR Lyrae ab-type light curve. Additionally, we report two RR Lyrae aband c types with ultralow amplitude.Fil: Cortés, C. C.. Universidad de Talca; ChileFil: Llancaqueo Albornoz, Á.. Universidad de Concepcion; ChileFil: Villanova, S.. Universidad de Concepcion; ChileFil: Ahumada, Javier Alejandro. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; ArgentinaFil: Parisi, Maria Celeste. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; ArgentinaIOP Publishing2023-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/248975Cortés, C. C.; Llancaqueo Albornoz, Á.; Villanova, S.; Ahumada, Javier Alejandro; Parisi, Maria Celeste; Variability in NGC 3201 Giant Stars; IOP Publishing; Astronomical Journal; 166; 3; 9-2023; 1-150004-6256CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.3847/1538-3881/ace111info:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.3847/1538-3881/ace111info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:23:31Zoai:ri.conicet.gov.ar:11336/248975instacron: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:34982025-10-22 11:23:32.211CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Variability in NGC 3201 Giant Stars
title Variability in NGC 3201 Giant Stars
spellingShingle Variability in NGC 3201 Giant Stars
Cortés, C. C.
GLOBULAR STAR CLUSTERS
VARIABLE STARS
title_short Variability in NGC 3201 Giant Stars
title_full Variability in NGC 3201 Giant Stars
title_fullStr Variability in NGC 3201 Giant Stars
title_full_unstemmed Variability in NGC 3201 Giant Stars
title_sort Variability in NGC 3201 Giant Stars
dc.creator.none.fl_str_mv Cortés, C. C.
Llancaqueo Albornoz, Á.
Villanova, S.
Ahumada, Javier Alejandro
Parisi, Maria Celeste
author Cortés, C. C.
author_facet Cortés, C. C.
Llancaqueo Albornoz, Á.
Villanova, S.
Ahumada, Javier Alejandro
Parisi, Maria Celeste
author_role author
author2 Llancaqueo Albornoz, Á.
Villanova, S.
Ahumada, Javier Alejandro
Parisi, Maria Celeste
author2_role author
author
author
author
dc.subject.none.fl_str_mv GLOBULAR STAR CLUSTERS
VARIABLE STARS
topic GLOBULAR STAR CLUSTERS
VARIABLE STARS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We present the analysis of 510 light curves in V and I bands of 255 giant stars in the globular cluster NGC 3201.Our aim is to expand the sample of new types of variables reported in a previous study. These variables show ashort period (PV < 0.6 day) and a low amplitude (A(V ) < 0.06 mag.). We first searched for variability using thegeneralized Lomb?Scargle and phase dispersion minimization periodograms of the sample, discarding 167 stars asnon-variables. We then applied the significance test and reduced the sample to 88 giants, of which we classified 18as possible variables, 11 as dubious, 41 as non-variables, and 18 as variables. We finally determined the clustermembership of this sample and grouped each star based on their light-curve shape. The discovered variables showperiods in the range 0.2440 < PV < 0.5868 days and amplitudes between 0.010 < A(V ) < 0.064 mag. Within thesample of 18 variable stars, we report the discovery of an object with a period PV = 0.3603 ± 0.0012 and amplitudeA(V ) = 0.703 ± 0.029 mag that shows a RR Lyrae ab-type light curve. Additionally, we report two RR Lyrae aband c types with ultralow amplitude.
Fil: Cortés, C. C.. Universidad de Talca; Chile
Fil: Llancaqueo Albornoz, Á.. Universidad de Concepcion; Chile
Fil: Villanova, S.. Universidad de Concepcion; Chile
Fil: Ahumada, Javier Alejandro. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina
Fil: Parisi, Maria Celeste. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; Argentina
description We present the analysis of 510 light curves in V and I bands of 255 giant stars in the globular cluster NGC 3201.Our aim is to expand the sample of new types of variables reported in a previous study. These variables show ashort period (PV < 0.6 day) and a low amplitude (A(V ) < 0.06 mag.). We first searched for variability using thegeneralized Lomb?Scargle and phase dispersion minimization periodograms of the sample, discarding 167 stars asnon-variables. We then applied the significance test and reduced the sample to 88 giants, of which we classified 18as possible variables, 11 as dubious, 41 as non-variables, and 18 as variables. We finally determined the clustermembership of this sample and grouped each star based on their light-curve shape. The discovered variables showperiods in the range 0.2440 < PV < 0.5868 days and amplitudes between 0.010 < A(V ) < 0.064 mag. Within thesample of 18 variable stars, we report the discovery of an object with a period PV = 0.3603 ± 0.0012 and amplitudeA(V ) = 0.703 ± 0.029 mag that shows a RR Lyrae ab-type light curve. Additionally, we report two RR Lyrae aband c types with ultralow amplitude.
publishDate 2023
dc.date.none.fl_str_mv 2023-09
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/11336/248975
Cortés, C. C.; Llancaqueo Albornoz, Á.; Villanova, S.; Ahumada, Javier Alejandro; Parisi, Maria Celeste; Variability in NGC 3201 Giant Stars; IOP Publishing; Astronomical Journal; 166; 3; 9-2023; 1-15
0004-6256
CONICET Digital
CONICET
url http://hdl.handle.net/11336/248975
identifier_str_mv Cortés, C. C.; Llancaqueo Albornoz, Á.; Villanova, S.; Ahumada, Javier Alejandro; Parisi, Maria Celeste; Variability in NGC 3201 Giant Stars; IOP Publishing; Astronomical Journal; 166; 3; 9-2023; 1-15
0004-6256
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.3847/1538-3881/ace111
info:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.3847/1538-3881/ace111
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv IOP Publishing
publisher.none.fl_str_mv IOP Publishing
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 12.982451

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