Candidate star clusters toward the inner Milky Way discovered on deep-stacked KS-band images from the VVV Survey
- Autores
- Ivanov, Valentin D.; Piatti, Andres Eduardo; Beamín, Juan-Carlos; Minniti, Dante; Borissova, Jordanka; Kurtev, Radostin; Hempel, Maren; Saito, Roberto K.
- Año de publicación
- 2017
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The census of star clusters in the inner Milky Way is incomplete because of extinction and crowding. Aims. We embarked on a program to expand the star cluster list in the direction of the inner Milky Way using deep stacks of KS-band images from the VISTA Variables in Via Lactea (VVV) Survey. Methods. We applied an automated two-step procedure to the point-source catalog derived from the deep KS images: first, we identified overdensities of stars, and then we selected only candidate clusters with probable member stars that match an isochrone with a certain age, distance, and extinction on the color-magnitude diagram. Results. This pilot project only investigates the cluster population in part of one VVV tile, that is, b201. We identified nine cluster candidates and estimated their parameters. The new candidates are compact with a typical radius on the sky of ∼0.2-0.4 arcmin (∼0.4-1.6 pc at their estimated distances). They are located at distances of ∼5-14 kpc from the Sun and are subject to moderate extinction of E(B-V) = 0.4-1.0 mag. They are sparse, probably evolved, with typical ages log(t/1 yr) ∼9. Based on the locations of the objects inside the Milky Way, we conclude that one of these objects is probably associated with the disk or halo and the remaining objects are associated with the bulge or the halo. Conclusions. The cluster candidates reported here push the VVV Survey cluster detection to the limit. These new objects demonstrate that the VVV survey has the potential to identify thousands of additional cluster candidates. The sub-arcsec angular resolution and the near-infrared wavelength regimen give it a critical advantage over other surveys.
Fil: Ivanov, Valentin D.. European Southern Observatory; Chile. European Southern Observatory; Alemania
Fil: Piatti, Andres Eduardo. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
Fil: Beamín, Juan-Carlos. The Millennium Institute of Astrophysics; Chile. Universidad de Valparaíso; Chile
Fil: Minniti, Dante. Universidad Andrés Bello; Chile
Fil: Borissova, Jordanka. The Millennium Institute of Astrophysics; Chile. Universidad de Valparaíso; Chile
Fil: Kurtev, Radostin. The Millennium Institute of Astrophysics; Chile. Universidad de Valparaíso; Chile
Fil: Hempel, Maren. Pontificia Universidad Católica de Chile; Chile
Fil: Saito, Roberto K.. Universidade Federal de Sergipe; Brasil - Materia
-
GALAXIES: STAR CLUSTERS: GENERAL
GLOBULAR CLUSTERS: GENERAL
INFRARED: GENERAL
OPEN CLUSTERS AND ASSOCIATIONS: GENERAL - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/97716
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oai:ri.conicet.gov.ar:11336/97716 |
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CONICET Digital (CONICET) |
spelling |
Candidate star clusters toward the inner Milky Way discovered on deep-stacked KS-band images from the VVV SurveyIvanov, Valentin D.Piatti, Andres EduardoBeamín, Juan-CarlosMinniti, DanteBorissova, JordankaKurtev, RadostinHempel, MarenSaito, Roberto K.GALAXIES: STAR CLUSTERS: GENERALGLOBULAR CLUSTERS: GENERALINFRARED: GENERALOPEN CLUSTERS AND ASSOCIATIONS: GENERALhttps://purl.org/becyt/ford/1.7https://purl.org/becyt/ford/1The census of star clusters in the inner Milky Way is incomplete because of extinction and crowding. Aims. We embarked on a program to expand the star cluster list in the direction of the inner Milky Way using deep stacks of KS-band images from the VISTA Variables in Via Lactea (VVV) Survey. Methods. We applied an automated two-step procedure to the point-source catalog derived from the deep KS images: first, we identified overdensities of stars, and then we selected only candidate clusters with probable member stars that match an isochrone with a certain age, distance, and extinction on the color-magnitude diagram. Results. This pilot project only investigates the cluster population in part of one VVV tile, that is, b201. We identified nine cluster candidates and estimated their parameters. The new candidates are compact with a typical radius on the sky of ∼0.2-0.4 arcmin (∼0.4-1.6 pc at their estimated distances). They are located at distances of ∼5-14 kpc from the Sun and are subject to moderate extinction of E(B-V) = 0.4-1.0 mag. They are sparse, probably evolved, with typical ages log(t/1 yr) ∼9. Based on the locations of the objects inside the Milky Way, we conclude that one of these objects is probably associated with the disk or halo and the remaining objects are associated with the bulge or the halo. Conclusions. The cluster candidates reported here push the VVV Survey cluster detection to the limit. These new objects demonstrate that the VVV survey has the potential to identify thousands of additional cluster candidates. The sub-arcsec angular resolution and the near-infrared wavelength regimen give it a critical advantage over other surveys.Fil: Ivanov, Valentin D.. European Southern Observatory; Chile. European Southern Observatory; AlemaniaFil: Piatti, Andres Eduardo. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; ArgentinaFil: Beamín, Juan-Carlos. The Millennium Institute of Astrophysics; Chile. Universidad de Valparaíso; ChileFil: Minniti, Dante. Universidad Andrés Bello; ChileFil: Borissova, Jordanka. The Millennium Institute of Astrophysics; Chile. Universidad de Valparaíso; ChileFil: Kurtev, Radostin. The Millennium Institute of Astrophysics; Chile. Universidad de Valparaíso; ChileFil: Hempel, Maren. Pontificia Universidad Católica de Chile; ChileFil: Saito, Roberto K.. Universidade Federal de Sergipe; BrasilEDP Sciences2017-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/97716Ivanov, Valentin D.; Piatti, Andres Eduardo; Beamín, Juan-Carlos; Minniti, Dante; Borissova, Jordanka; et al.; Candidate star clusters toward the inner Milky Way discovered on deep-stacked KS-band images from the VVV Survey; EDP Sciences; Astronomy and Astrophysics; 600; A112; 4-2017; 1-80004-63611432-0746CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2017/04/aa30179-16/aa30179-16.htmlinfo:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201630179info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:54:34Zoai:ri.conicet.gov.ar:11336/97716instacron: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 09:54:35.254CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Candidate star clusters toward the inner Milky Way discovered on deep-stacked KS-band images from the VVV Survey |
title |
Candidate star clusters toward the inner Milky Way discovered on deep-stacked KS-band images from the VVV Survey |
spellingShingle |
Candidate star clusters toward the inner Milky Way discovered on deep-stacked KS-band images from the VVV Survey Ivanov, Valentin D. GALAXIES: STAR CLUSTERS: GENERAL GLOBULAR CLUSTERS: GENERAL INFRARED: GENERAL OPEN CLUSTERS AND ASSOCIATIONS: GENERAL |
title_short |
Candidate star clusters toward the inner Milky Way discovered on deep-stacked KS-band images from the VVV Survey |
title_full |
Candidate star clusters toward the inner Milky Way discovered on deep-stacked KS-band images from the VVV Survey |
title_fullStr |
Candidate star clusters toward the inner Milky Way discovered on deep-stacked KS-band images from the VVV Survey |
title_full_unstemmed |
Candidate star clusters toward the inner Milky Way discovered on deep-stacked KS-band images from the VVV Survey |
title_sort |
Candidate star clusters toward the inner Milky Way discovered on deep-stacked KS-band images from the VVV Survey |
dc.creator.none.fl_str_mv |
Ivanov, Valentin D. Piatti, Andres Eduardo Beamín, Juan-Carlos Minniti, Dante Borissova, Jordanka Kurtev, Radostin Hempel, Maren Saito, Roberto K. |
author |
Ivanov, Valentin D. |
author_facet |
Ivanov, Valentin D. Piatti, Andres Eduardo Beamín, Juan-Carlos Minniti, Dante Borissova, Jordanka Kurtev, Radostin Hempel, Maren Saito, Roberto K. |
author_role |
author |
author2 |
Piatti, Andres Eduardo Beamín, Juan-Carlos Minniti, Dante Borissova, Jordanka Kurtev, Radostin Hempel, Maren Saito, Roberto K. |
author2_role |
author author author author author author author |
dc.subject.none.fl_str_mv |
GALAXIES: STAR CLUSTERS: GENERAL GLOBULAR CLUSTERS: GENERAL INFRARED: GENERAL OPEN CLUSTERS AND ASSOCIATIONS: GENERAL |
topic |
GALAXIES: STAR CLUSTERS: GENERAL GLOBULAR CLUSTERS: GENERAL INFRARED: GENERAL OPEN CLUSTERS AND ASSOCIATIONS: GENERAL |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.7 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
The census of star clusters in the inner Milky Way is incomplete because of extinction and crowding. Aims. We embarked on a program to expand the star cluster list in the direction of the inner Milky Way using deep stacks of KS-band images from the VISTA Variables in Via Lactea (VVV) Survey. Methods. We applied an automated two-step procedure to the point-source catalog derived from the deep KS images: first, we identified overdensities of stars, and then we selected only candidate clusters with probable member stars that match an isochrone with a certain age, distance, and extinction on the color-magnitude diagram. Results. This pilot project only investigates the cluster population in part of one VVV tile, that is, b201. We identified nine cluster candidates and estimated their parameters. The new candidates are compact with a typical radius on the sky of ∼0.2-0.4 arcmin (∼0.4-1.6 pc at their estimated distances). They are located at distances of ∼5-14 kpc from the Sun and are subject to moderate extinction of E(B-V) = 0.4-1.0 mag. They are sparse, probably evolved, with typical ages log(t/1 yr) ∼9. Based on the locations of the objects inside the Milky Way, we conclude that one of these objects is probably associated with the disk or halo and the remaining objects are associated with the bulge or the halo. Conclusions. The cluster candidates reported here push the VVV Survey cluster detection to the limit. These new objects demonstrate that the VVV survey has the potential to identify thousands of additional cluster candidates. The sub-arcsec angular resolution and the near-infrared wavelength regimen give it a critical advantage over other surveys. Fil: Ivanov, Valentin D.. European Southern Observatory; Chile. European Southern Observatory; Alemania Fil: Piatti, Andres Eduardo. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina Fil: Beamín, Juan-Carlos. The Millennium Institute of Astrophysics; Chile. Universidad de Valparaíso; Chile Fil: Minniti, Dante. Universidad Andrés Bello; Chile Fil: Borissova, Jordanka. The Millennium Institute of Astrophysics; Chile. Universidad de Valparaíso; Chile Fil: Kurtev, Radostin. The Millennium Institute of Astrophysics; Chile. Universidad de Valparaíso; Chile Fil: Hempel, Maren. Pontificia Universidad Católica de Chile; Chile Fil: Saito, Roberto K.. Universidade Federal de Sergipe; Brasil |
description |
The census of star clusters in the inner Milky Way is incomplete because of extinction and crowding. Aims. We embarked on a program to expand the star cluster list in the direction of the inner Milky Way using deep stacks of KS-band images from the VISTA Variables in Via Lactea (VVV) Survey. Methods. We applied an automated two-step procedure to the point-source catalog derived from the deep KS images: first, we identified overdensities of stars, and then we selected only candidate clusters with probable member stars that match an isochrone with a certain age, distance, and extinction on the color-magnitude diagram. Results. This pilot project only investigates the cluster population in part of one VVV tile, that is, b201. We identified nine cluster candidates and estimated their parameters. The new candidates are compact with a typical radius on the sky of ∼0.2-0.4 arcmin (∼0.4-1.6 pc at their estimated distances). They are located at distances of ∼5-14 kpc from the Sun and are subject to moderate extinction of E(B-V) = 0.4-1.0 mag. They are sparse, probably evolved, with typical ages log(t/1 yr) ∼9. Based on the locations of the objects inside the Milky Way, we conclude that one of these objects is probably associated with the disk or halo and the remaining objects are associated with the bulge or the halo. Conclusions. The cluster candidates reported here push the VVV Survey cluster detection to the limit. These new objects demonstrate that the VVV survey has the potential to identify thousands of additional cluster candidates. The sub-arcsec angular resolution and the near-infrared wavelength regimen give it a critical advantage over other surveys. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-04 |
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/11336/97716 Ivanov, Valentin D.; Piatti, Andres Eduardo; Beamín, Juan-Carlos; Minniti, Dante; Borissova, Jordanka; et al.; Candidate star clusters toward the inner Milky Way discovered on deep-stacked KS-band images from the VVV Survey; EDP Sciences; Astronomy and Astrophysics; 600; A112; 4-2017; 1-8 0004-6361 1432-0746 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/97716 |
identifier_str_mv |
Ivanov, Valentin D.; Piatti, Andres Eduardo; Beamín, Juan-Carlos; Minniti, Dante; Borissova, Jordanka; et al.; Candidate star clusters toward the inner Milky Way discovered on deep-stacked KS-band images from the VVV Survey; EDP Sciences; Astronomy and Astrophysics; 600; A112; 4-2017; 1-8 0004-6361 1432-0746 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2017/04/aa30179-16/aa30179-16.html info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201630179 |
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 |
dc.publisher.none.fl_str_mv |
EDP Sciences |
publisher.none.fl_str_mv |
EDP Sciences |
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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13.070432 |