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
- Autores
- Alonso Garciá, Javier; Smith, Leigh C.; Catelan, Márcio; Minniti, Dante; Navarrete, Camila; Borissova, Jura; Carballo Bello, Julio A.; Contreras Ramos, Rodrigo; Fernández Trincado, José G.; Ferreira Lopes, Carlos E.; Gran, Felipe; Garro, Elisa R.; Geisler, Doug; Guo, Zhen; Hempel, Maren; Kerins, Eamonn; Lucas, Philip W.; Palma, Tali; Peña Ramírez, Karla; Ramírez Alegriá, Sebastián; Saito, Roberto
- Año de publicación
- 2021
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- 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.
Fil: Alonso Garciá, Javier. Universidad de Antofagasta; Chile. Millennium Institute of Astrophysics; Chile
Fil: Smith, Leigh C.. University of Cambridge; Reino Unido
Fil: Catelan, Márcio. Pontificia Universidad Católica de Chile; Chile. Millennium Institute of Astrophysics; Chile
Fil: Minniti, Dante. Universidad Andrés Bello; Chile. Vatican Observatory; Italia
Fil: Navarrete, Camila. Millennium Institute of Astrophysics; Chile. European Southern Observatory Chile; Chile
Fil: Borissova, Jura. Universidad de Valparaíso; Chile. Millennium Institute of Astrophysics; Chile
Fil: Carballo Bello, Julio A.. Universidad de Tarapaca.; Chile
Fil: Contreras Ramos, Rodrigo. Pontificia Universidad Católica de Chile; Chile. Millennium Institute of Astrophysics; Chile
Fil: Fernández Trincado, José G.. Universidad de Atacama.; Chile
Fil: Ferreira Lopes, Carlos E.. Centro de Previsao de Tempo e Estudos Climáticos. Instituto Nacional de Pesquisas Espaciais; Brasil
Fil: Gran, Felipe. Pontificia Universidad Católica de Chile; Chile. European Southern Observatory Chile; Chile. Millennium Institute of Astrophysics; Chile
Fil: Garro, Elisa R.. Universidad Andrés Bello; Chile
Fil: Geisler, Doug. Universidad de Concepción; Chile. Universidad de La Serena; Chile
Fil: Guo, Zhen. University Of Hertfordshire; Reino Unido
Fil: Hempel, Maren. Universidad Andrés Bello; Chile. Max-Planck-Institut für Astronomie; Alemania
Fil: Kerins, Eamonn. University of Manchester; Reino Unido
Fil: Lucas, Philip W.. University Of Hertfordshire; Reino Unido
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
Fil: Peña Ramírez, Karla. Universidad de Antofagasta; Chile
Fil: Ramírez Alegriá, Sebastián. Universidad de Antofagasta; Chile
Fil: Saito, Roberto. Universidade Federal de Santa Catarina; Brasil - Materia
-
GLOBULAR CLUSTERS: GENERAL
STARS: VARIABLES: GENERAL
STARS: VARIABLES: RR LYRAE - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by/2.5/ar/
- Repositorio
.jpg)
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/158634
Ver los metadatos del registro completo
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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 10Alonso Garciá, JavierSmith, Leigh C.Catelan, MárcioMinniti, DanteNavarrete, CamilaBorissova, JuraCarballo Bello, Julio A.Contreras Ramos, RodrigoFernández Trincado, José G.Ferreira Lopes, Carlos E.Gran, FelipeGarro, Elisa R.Geisler, DougGuo, ZhenHempel, MarenKerins, EamonnLucas, Philip W.Palma, TaliPeña Ramírez, KarlaRamírez Alegriá, SebastiánSaito, RobertoGLOBULAR CLUSTERS: GENERALSTARS: VARIABLES: GENERALSTARS: VARIABLES: RR LYRAEhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Context. 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.Fil: Alonso Garciá, Javier. Universidad de Antofagasta; Chile. Millennium Institute of Astrophysics; ChileFil: Smith, Leigh C.. University of Cambridge; Reino UnidoFil: Catelan, Márcio. Pontificia Universidad Católica de Chile; Chile. Millennium Institute of Astrophysics; ChileFil: Minniti, Dante. Universidad Andrés Bello; Chile. Vatican Observatory; ItaliaFil: Navarrete, Camila. Millennium Institute of Astrophysics; Chile. European Southern Observatory Chile; ChileFil: Borissova, Jura. Universidad de Valparaíso; Chile. Millennium Institute of Astrophysics; ChileFil: Carballo Bello, Julio A.. Universidad de Tarapaca.; ChileFil: Contreras Ramos, Rodrigo. Pontificia Universidad Católica de Chile; Chile. Millennium Institute of Astrophysics; ChileFil: Fernández Trincado, José G.. Universidad de Atacama.; ChileFil: Ferreira Lopes, Carlos E.. Centro de Previsao de Tempo e Estudos Climáticos. Instituto Nacional de Pesquisas Espaciais; BrasilFil: Gran, Felipe. Pontificia Universidad Católica de Chile; Chile. European Southern Observatory Chile; Chile. Millennium Institute of Astrophysics; ChileFil: Garro, Elisa R.. Universidad Andrés Bello; ChileFil: Geisler, Doug. Universidad de Concepción; Chile. Universidad de La Serena; ChileFil: Guo, Zhen. University Of Hertfordshire; Reino UnidoFil: Hempel, Maren. Universidad Andrés Bello; Chile. Max-Planck-Institut für Astronomie; AlemaniaFil: Kerins, Eamonn. University of Manchester; Reino UnidoFil: Lucas, Philip W.. University Of Hertfordshire; Reino UnidoFil: 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; ArgentinaFil: Peña Ramírez, Karla. Universidad de Antofagasta; ChileFil: Ramírez Alegriá, Sebastián. Universidad de Antofagasta; ChileFil: Saito, Roberto. Universidade Federal de Santa Catarina; BrasilEDP Sciences2021-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/158634Alonso 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; 1-180004-63611432-0746CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2021/07/aa40546-21/aa40546-21.htmlinfo:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/202140546info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/2105.05825info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:48:25Zoai:ri.conicet.gov.ar:11336/158634instacron: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:34982025-09-29 09:48:25.576CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
| dc.title.none.fl_str_mv |
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 |
| 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 |
| spellingShingle |
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 Alonso Garciá, Javier GLOBULAR CLUSTERS: GENERAL STARS: VARIABLES: GENERAL STARS: VARIABLES: RR LYRAE |
| title_short |
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 |
| title_full |
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 |
| title_fullStr |
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 |
| title_full_unstemmed |
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 |
| title_sort |
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.creator.none.fl_str_mv |
Alonso Garciá, Javier Smith, Leigh C. Catelan, Márcio Minniti, Dante Navarrete, Camila Borissova, Jura Carballo Bello, Julio A. Contreras Ramos, Rodrigo Fernández Trincado, José G. Ferreira Lopes, Carlos E. Gran, Felipe Garro, Elisa R. Geisler, Doug Guo, Zhen Hempel, Maren Kerins, Eamonn Lucas, Philip W. Palma, Tali Peña Ramírez, Karla Ramírez Alegriá, Sebastián Saito, Roberto |
| author |
Alonso Garciá, Javier |
| author_facet |
Alonso Garciá, Javier Smith, Leigh C. Catelan, Márcio Minniti, Dante Navarrete, Camila Borissova, Jura Carballo Bello, Julio A. Contreras Ramos, Rodrigo Fernández Trincado, José G. Ferreira Lopes, Carlos E. Gran, Felipe Garro, Elisa R. Geisler, Doug Guo, Zhen Hempel, Maren Kerins, Eamonn Lucas, Philip W. Palma, Tali Peña Ramírez, Karla Ramírez Alegriá, Sebastián Saito, Roberto |
| author_role |
author |
| author2 |
Smith, Leigh C. Catelan, Márcio Minniti, Dante Navarrete, Camila Borissova, Jura Carballo Bello, Julio A. Contreras Ramos, Rodrigo Fernández Trincado, José G. Ferreira Lopes, Carlos E. Gran, Felipe Garro, Elisa R. Geisler, Doug Guo, Zhen Hempel, Maren Kerins, Eamonn Lucas, Philip W. Palma, Tali Peña Ramírez, Karla Ramírez Alegriá, Sebastián Saito, Roberto |
| author2_role |
author author author author author author author author author author author author author author author author author author author author |
| dc.subject.none.fl_str_mv |
GLOBULAR CLUSTERS: GENERAL STARS: VARIABLES: GENERAL STARS: VARIABLES: RR LYRAE |
| topic |
GLOBULAR CLUSTERS: GENERAL STARS: VARIABLES: GENERAL STARS: VARIABLES: RR LYRAE |
| purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
| dc.description.none.fl_txt_mv |
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. Fil: Alonso Garciá, Javier. Universidad de Antofagasta; Chile. Millennium Institute of Astrophysics; Chile Fil: Smith, Leigh C.. University of Cambridge; Reino Unido Fil: Catelan, Márcio. Pontificia Universidad Católica de Chile; Chile. Millennium Institute of Astrophysics; Chile Fil: Minniti, Dante. Universidad Andrés Bello; Chile. Vatican Observatory; Italia Fil: Navarrete, Camila. Millennium Institute of Astrophysics; Chile. European Southern Observatory Chile; Chile Fil: Borissova, Jura. Universidad de Valparaíso; Chile. Millennium Institute of Astrophysics; Chile Fil: Carballo Bello, Julio A.. Universidad de Tarapaca.; Chile Fil: Contreras Ramos, Rodrigo. Pontificia Universidad Católica de Chile; Chile. Millennium Institute of Astrophysics; Chile Fil: Fernández Trincado, José G.. Universidad de Atacama.; Chile Fil: Ferreira Lopes, Carlos E.. Centro de Previsao de Tempo e Estudos Climáticos. Instituto Nacional de Pesquisas Espaciais; Brasil Fil: Gran, Felipe. Pontificia Universidad Católica de Chile; Chile. European Southern Observatory Chile; Chile. Millennium Institute of Astrophysics; Chile Fil: Garro, Elisa R.. Universidad Andrés Bello; Chile Fil: Geisler, Doug. Universidad de Concepción; Chile. Universidad de La Serena; Chile Fil: Guo, Zhen. University Of Hertfordshire; Reino Unido Fil: Hempel, Maren. Universidad Andrés Bello; Chile. Max-Planck-Institut für Astronomie; Alemania Fil: Kerins, Eamonn. University of Manchester; Reino Unido Fil: Lucas, Philip W.. University Of Hertfordshire; Reino Unido 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 Fil: Peña Ramírez, Karla. Universidad de Antofagasta; Chile Fil: Ramírez Alegriá, Sebastián. Universidad de Antofagasta; Chile Fil: Saito, Roberto. Universidade Federal de Santa Catarina; Brasil |
| description |
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. |
| publishDate |
2021 |
| dc.date.none.fl_str_mv |
2021-07 |
| 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 |
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article |
| status_str |
publishedVersion |
| dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11336/158634 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 0004-6361 1432-0746 CONICET Digital CONICET |
| url |
http://hdl.handle.net/11336/158634 |
| identifier_str_mv |
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 0004-6361 1432-0746 CONICET Digital CONICET |
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eng |
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eng |
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