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
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/97716
Acceder
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network_acronym_str CONICETDig
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network_name_str 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 Técnicas2025-10-22T11:23:52Zoai: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:34982025-10-22 11:23:52.997CONICET 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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score 12.982451

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