Washington photometry of candidate star clusters in the Small Magellanic Cloud

We present for the first time Washington CT1 photometry for 11 unstudied or poorly studied candidate star clusters. The selected objects are of small angular size, contain a handful of stars, and are projected towards the innermost regions of the Small Magellanic Cloud (SMC). The respective colour-m...

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Autores principales: Piatti, A.E., Bica, E.
Formato: JOUR
Materias:
General
Individual
Photometric - galaxies
SMC - galaxies
Star clusters
Techniques
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00358711_v425_n4_p3085_Piatti
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00358711_v425_n4_p3085_Piatti
record_format dspace
spelling todo:paper_00358711_v425_n4_p3085_Piatti2023-10-03T14:47:05Z Washington photometry of candidate star clusters in the Small Magellanic Cloud Piatti, A.E. Bica, E. General Individual Photometric - galaxies SMC - galaxies Star clusters Techniques We present for the first time Washington CT1 photometry for 11 unstudied or poorly studied candidate star clusters. The selected objects are of small angular size, contain a handful of stars, and are projected towards the innermost regions of the Small Magellanic Cloud (SMC). The respective colour-magnitude diagrams (CMDs) were cleaned of the unavoidable star field contamination by taking advantage of a procedure which makes use of variable size CMD cells. This method has shown to be able to eliminate stochastic effects in the cluster CMDs caused by the presence of isolated bright stars, as well as to make a finer cleaning in the most populous CMD regions. Our results suggest that nearly one-third of the studied candidate star clusters would appear to be genuine physical systems. In this sense, the ages previously derived for some of them mostly reflect those of the composite stellar populations of the SMC field. Finally, we used the spatial distribution in the SMC of possible non-clusters to statistically decontaminate that of the SMC cluster system. We found that there is no clear difference between expected and observed cluster spatial distributions, although it would become significant at a 2σ level between a ≈ 0°. 3 and 1°. 2 (the semi-major axis of an ellipse parallel to the SMC bar and with b/a = 1/2), if the asterisms were increased up to 20 per cent. © 2012 The Authors. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00358711_v425_n4_p3085_Piatti
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic General
Individual
Photometric - galaxies
SMC - galaxies
Star clusters
Techniques
spellingShingle General
Individual
Photometric - galaxies
SMC - galaxies
Star clusters
Techniques
Piatti, A.E.
Bica, E.
Washington photometry of candidate star clusters in the Small Magellanic Cloud
topic_facet General
Individual
Photometric - galaxies
SMC - galaxies
Star clusters
Techniques
description We present for the first time Washington CT1 photometry for 11 unstudied or poorly studied candidate star clusters. The selected objects are of small angular size, contain a handful of stars, and are projected towards the innermost regions of the Small Magellanic Cloud (SMC). The respective colour-magnitude diagrams (CMDs) were cleaned of the unavoidable star field contamination by taking advantage of a procedure which makes use of variable size CMD cells. This method has shown to be able to eliminate stochastic effects in the cluster CMDs caused by the presence of isolated bright stars, as well as to make a finer cleaning in the most populous CMD regions. Our results suggest that nearly one-third of the studied candidate star clusters would appear to be genuine physical systems. In this sense, the ages previously derived for some of them mostly reflect those of the composite stellar populations of the SMC field. Finally, we used the spatial distribution in the SMC of possible non-clusters to statistically decontaminate that of the SMC cluster system. We found that there is no clear difference between expected and observed cluster spatial distributions, although it would become significant at a 2σ level between a ≈ 0°. 3 and 1°. 2 (the semi-major axis of an ellipse parallel to the SMC bar and with b/a = 1/2), if the asterisms were increased up to 20 per cent. © 2012 The Authors.
format JOUR
author Piatti, A.E.
Bica, E.
author_facet Piatti, A.E.
Bica, E.
author_sort Piatti, A.E.
title Washington photometry of candidate star clusters in the Small Magellanic Cloud
title_short Washington photometry of candidate star clusters in the Small Magellanic Cloud
title_full Washington photometry of candidate star clusters in the Small Magellanic Cloud
title_fullStr Washington photometry of candidate star clusters in the Small Magellanic Cloud
title_full_unstemmed Washington photometry of candidate star clusters in the Small Magellanic Cloud
title_sort washington photometry of candidate star clusters in the small magellanic cloud
url http://hdl.handle.net/20.500.12110/paper_00358711_v425_n4_p3085_Piatti
work_keys_str_mv AT piattiae washingtonphotometryofcandidatestarclustersinthesmallmagellaniccloud
AT bicae washingtonphotometryofcandidatestarclustersinthesmallmagellaniccloud
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