The VMC Survey - XXI. New star cluster candidates discovered from infrared photometry in the Small Magellanic Cloud

Autores
Piatti, Andres Eduardo; Ivanov, Valentin D.; Rubele, Stefano; Marconi, Marcella; Ripepi, Vincenzo; Cioni, Maria Rosa L.; Oliveira, Joana M.; Bekki, Kenji
Año de publicación
2016
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We report the first search for new star clusters performed using the VISTA near-infrared YJKs Magellanic Clouds survey (VMC) data sets. We chose a pilot field of ∼0.4 deg2 located in the South-west of the Small Magelllanic Cloud bar, where the star field is among the densest and highest reddened region in the galaxy. In order to devise an appropriate automatic procedure we made use of dimensions and stellar densities observed in the VMC data sets of the known clusters in this area. We executed different kernel density estimations over a sample of more than 358 000 stars with magnitudes measured in the three YJKs filters. We analysed the new cluster candidates whose colour–magnitude diagrams (CMDs), cleaned from field star contamination, were used to assess the clusters’ reality and estimate reddenings and ages of the genuine systems. As a result 38 objects (≈ a 55 per cent increase in the known star clusters located in the surveyed field) of 0.15–0.40 arcmin (2.6–7.0 pc) in radius resulted to have near-infrared CMD features which resemble those of star clusters of young to moderate intermediate age (log(t yr−1) ∼7.5–9.0). Most of the new star cluster candidates are hardly recognizable in optical images without the help of a sound star field decontaminated CMD analysis. For highly reddened star cluster candidates (E(B − V) ≥ 0.6 mag) the VMC data sets were necessary in order to recognize them.
Fil: Piatti, Andres Eduardo. 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
Fil: Ivanov, Valentin D.. European Southern Observatory; Alemania
Fil: Rubele, Stefano. Osservatorio Astronomico di Padova; Italia. Università di Padova; Italia. Istituto Nazionale di Astrofisica; Italia
Fil: Marconi, Marcella. Osservatorio Astronomico di Capodimonte; Italia. Istituto Nazionale di Astrofisica; Italia
Fil: Ripepi, Vincenzo. Osservatorio Astronomico di Capodimonte; Italia. Istituto Nazionale di Astrofisica; Italia
Fil: Cioni, Maria Rosa L.. Universitat Potsdam; Alemania. University of Hertfordshire; Reino Unido
Fil: Oliveira, Joana M.. Keele University; Reino Unido
Fil: Bekki, Kenji. University of Western Australia; Australia
Materia
GALAXIES: INDIVIDUAL: SMC
MAGELLANIC CLOUDS
TECHNIQUES: PHOTOMETRIC
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:11336/180869
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling The VMC Survey - XXI. New star cluster candidates discovered from infrared photometry in the Small Magellanic CloudPiatti, Andres EduardoIvanov, Valentin D.Rubele, StefanoMarconi, MarcellaRipepi, VincenzoCioni, Maria Rosa L.Oliveira, Joana M.Bekki, KenjiGALAXIES: INDIVIDUAL: SMCMAGELLANIC CLOUDSTECHNIQUES: PHOTOMETRIChttps://purl.org/becyt/ford/1.7https://purl.org/becyt/ford/1We report the first search for new star clusters performed using the VISTA near-infrared YJKs Magellanic Clouds survey (VMC) data sets. We chose a pilot field of ∼0.4 deg2 located in the South-west of the Small Magelllanic Cloud bar, where the star field is among the densest and highest reddened region in the galaxy. In order to devise an appropriate automatic procedure we made use of dimensions and stellar densities observed in the VMC data sets of the known clusters in this area. We executed different kernel density estimations over a sample of more than 358 000 stars with magnitudes measured in the three YJKs filters. We analysed the new cluster candidates whose colour–magnitude diagrams (CMDs), cleaned from field star contamination, were used to assess the clusters’ reality and estimate reddenings and ages of the genuine systems. As a result 38 objects (≈ a 55 per cent increase in the known star clusters located in the surveyed field) of 0.15–0.40 arcmin (2.6–7.0 pc) in radius resulted to have near-infrared CMD features which resemble those of star clusters of young to moderate intermediate age (log(t yr−1) ∼7.5–9.0). Most of the new star cluster candidates are hardly recognizable in optical images without the help of a sound star field decontaminated CMD analysis. For highly reddened star cluster candidates (E(B − V) ≥ 0.6 mag) the VMC data sets were necessary in order to recognize them.Fil: Piatti, Andres Eduardo. 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; ArgentinaFil: Ivanov, Valentin D.. European Southern Observatory; AlemaniaFil: Rubele, Stefano. Osservatorio Astronomico di Padova; Italia. Università di Padova; Italia. Istituto Nazionale di Astrofisica; ItaliaFil: Marconi, Marcella. Osservatorio Astronomico di Capodimonte; Italia. Istituto Nazionale di Astrofisica; ItaliaFil: Ripepi, Vincenzo. Osservatorio Astronomico di Capodimonte; Italia. Istituto Nazionale di Astrofisica; ItaliaFil: Cioni, Maria Rosa L.. Universitat Potsdam; Alemania. University of Hertfordshire; Reino UnidoFil: Oliveira, Joana M.. Keele University; Reino UnidoFil: Bekki, Kenji. University of Western Australia; AustraliaWiley Blackwell Publishing, Inc2016-07-21info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/180869Piatti, Andres Eduardo; Ivanov, Valentin D.; Rubele, Stefano; Marconi, Marcella; Ripepi, Vincenzo; et al.; The VMC Survey - XXI. New star cluster candidates discovered from infrared photometry in the Small Magellanic Cloud; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 460; 1; 21-7-2016; 383-3950035-87111365-2966CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article/460/1/383/2608792info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stw1000info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:58:23Zoai:ri.conicet.gov.ar:11336/180869instacron: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 11:58:23.531CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv The VMC Survey - XXI. New star cluster candidates discovered from infrared photometry in the Small Magellanic Cloud
title The VMC Survey - XXI. New star cluster candidates discovered from infrared photometry in the Small Magellanic Cloud
spellingShingle The VMC Survey - XXI. New star cluster candidates discovered from infrared photometry in the Small Magellanic Cloud
Piatti, Andres Eduardo
GALAXIES: INDIVIDUAL: SMC
MAGELLANIC CLOUDS
TECHNIQUES: PHOTOMETRIC
title_short The VMC Survey - XXI. New star cluster candidates discovered from infrared photometry in the Small Magellanic Cloud
title_full The VMC Survey - XXI. New star cluster candidates discovered from infrared photometry in the Small Magellanic Cloud
title_fullStr The VMC Survey - XXI. New star cluster candidates discovered from infrared photometry in the Small Magellanic Cloud
title_full_unstemmed The VMC Survey - XXI. New star cluster candidates discovered from infrared photometry in the Small Magellanic Cloud
title_sort The VMC Survey - XXI. New star cluster candidates discovered from infrared photometry in the Small Magellanic Cloud
dc.creator.none.fl_str_mv Piatti, Andres Eduardo
Ivanov, Valentin D.
Rubele, Stefano
Marconi, Marcella
Ripepi, Vincenzo
Cioni, Maria Rosa L.
Oliveira, Joana M.
Bekki, Kenji
author Piatti, Andres Eduardo
author_facet Piatti, Andres Eduardo
Ivanov, Valentin D.
Rubele, Stefano
Marconi, Marcella
Ripepi, Vincenzo
Cioni, Maria Rosa L.
Oliveira, Joana M.
Bekki, Kenji
author_role author
author2 Ivanov, Valentin D.
Rubele, Stefano
Marconi, Marcella
Ripepi, Vincenzo
Cioni, Maria Rosa L.
Oliveira, Joana M.
Bekki, Kenji
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv GALAXIES: INDIVIDUAL: SMC
MAGELLANIC CLOUDS
TECHNIQUES: PHOTOMETRIC
topic GALAXIES: INDIVIDUAL: SMC
MAGELLANIC CLOUDS
TECHNIQUES: PHOTOMETRIC
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.7
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We report the first search for new star clusters performed using the VISTA near-infrared YJKs Magellanic Clouds survey (VMC) data sets. We chose a pilot field of ∼0.4 deg2 located in the South-west of the Small Magelllanic Cloud bar, where the star field is among the densest and highest reddened region in the galaxy. In order to devise an appropriate automatic procedure we made use of dimensions and stellar densities observed in the VMC data sets of the known clusters in this area. We executed different kernel density estimations over a sample of more than 358 000 stars with magnitudes measured in the three YJKs filters. We analysed the new cluster candidates whose colour–magnitude diagrams (CMDs), cleaned from field star contamination, were used to assess the clusters’ reality and estimate reddenings and ages of the genuine systems. As a result 38 objects (≈ a 55 per cent increase in the known star clusters located in the surveyed field) of 0.15–0.40 arcmin (2.6–7.0 pc) in radius resulted to have near-infrared CMD features which resemble those of star clusters of young to moderate intermediate age (log(t yr−1) ∼7.5–9.0). Most of the new star cluster candidates are hardly recognizable in optical images without the help of a sound star field decontaminated CMD analysis. For highly reddened star cluster candidates (E(B − V) ≥ 0.6 mag) the VMC data sets were necessary in order to recognize them.
Fil: Piatti, Andres Eduardo. 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
Fil: Ivanov, Valentin D.. European Southern Observatory; Alemania
Fil: Rubele, Stefano. Osservatorio Astronomico di Padova; Italia. Università di Padova; Italia. Istituto Nazionale di Astrofisica; Italia
Fil: Marconi, Marcella. Osservatorio Astronomico di Capodimonte; Italia. Istituto Nazionale di Astrofisica; Italia
Fil: Ripepi, Vincenzo. Osservatorio Astronomico di Capodimonte; Italia. Istituto Nazionale di Astrofisica; Italia
Fil: Cioni, Maria Rosa L.. Universitat Potsdam; Alemania. University of Hertfordshire; Reino Unido
Fil: Oliveira, Joana M.. Keele University; Reino Unido
Fil: Bekki, Kenji. University of Western Australia; Australia
description We report the first search for new star clusters performed using the VISTA near-infrared YJKs Magellanic Clouds survey (VMC) data sets. We chose a pilot field of ∼0.4 deg2 located in the South-west of the Small Magelllanic Cloud bar, where the star field is among the densest and highest reddened region in the galaxy. In order to devise an appropriate automatic procedure we made use of dimensions and stellar densities observed in the VMC data sets of the known clusters in this area. We executed different kernel density estimations over a sample of more than 358 000 stars with magnitudes measured in the three YJKs filters. We analysed the new cluster candidates whose colour–magnitude diagrams (CMDs), cleaned from field star contamination, were used to assess the clusters’ reality and estimate reddenings and ages of the genuine systems. As a result 38 objects (≈ a 55 per cent increase in the known star clusters located in the surveyed field) of 0.15–0.40 arcmin (2.6–7.0 pc) in radius resulted to have near-infrared CMD features which resemble those of star clusters of young to moderate intermediate age (log(t yr−1) ∼7.5–9.0). Most of the new star cluster candidates are hardly recognizable in optical images without the help of a sound star field decontaminated CMD analysis. For highly reddened star cluster candidates (E(B − V) ≥ 0.6 mag) the VMC data sets were necessary in order to recognize them.
publishDate 2016
dc.date.none.fl_str_mv 2016-07-21
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/11336/180869
Piatti, Andres Eduardo; Ivanov, Valentin D.; Rubele, Stefano; Marconi, Marcella; Ripepi, Vincenzo; et al.; The VMC Survey - XXI. New star cluster candidates discovered from infrared photometry in the Small Magellanic Cloud; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 460; 1; 21-7-2016; 383-395
0035-8711
1365-2966
CONICET Digital
CONICET
url http://hdl.handle.net/11336/180869
identifier_str_mv Piatti, Andres Eduardo; Ivanov, Valentin D.; Rubele, Stefano; Marconi, Marcella; Ripepi, Vincenzo; et al.; The VMC Survey - XXI. New star cluster candidates discovered from infrared photometry in the Small Magellanic Cloud; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 460; 1; 21-7-2016; 383-395
0035-8711
1365-2966
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://academic.oup.com/mnras/article/460/1/383/2608792
info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stw1000
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 Wiley Blackwell Publishing, Inc
publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
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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