A new extended main-sequence turnoff star cluster in the large magellanic cloud

We present results on the age and metallicity estimates of the poorly studied Large Magellanic Cloud (LMC) cluster SL 529, from CCD SDSS gr photometry obtained at the Gemini South telescope with the GMOS attached. The cluster main-sequence turnoffs (MSTO) region possesses an extended structure, with...

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Detalles Bibliográficos
Autor principal: Piatti, A.E.
Formato: JOUR
Materias:
Galaxies: individual: LMC
Galaxies: Star clusters: general
Magellanic Clouds
Techniques: Photometric
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00358711_v430_n3_p2358_Piatti
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00358711_v430_n3_p2358_Piatti
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spelling todo:paper_00358711_v430_n3_p2358_Piatti2023-10-03T14:47:06Z A new extended main-sequence turnoff star cluster in the large magellanic cloud Piatti, A.E. Galaxies: individual: LMC Galaxies: Star clusters: general Magellanic Clouds Techniques: Photometric We present results on the age and metallicity estimates of the poorly studied Large Magellanic Cloud (LMC) cluster SL 529, from CCD SDSS gr photometry obtained at the Gemini South telescope with the GMOS attached. The cluster main-sequence turnoffs (MSTO) region possesses an extended structure, with an age spread (~0.5 Gyr) bigger than the mean age width of known extended MSTO (EMSTO) LMC clusters. We report for the first time a mean cluster age of 2.25 Gyr and a mean cluster metallicity of Z = 0.004, which place it as the most metal-poor and oldest cluster in the EMSTO LMC cluster group. In addition, the cluster red clump appears to be formed by two concentrations of stars - although it is not clear whether this feature can be caused, in part, by binary interactions and mergers - whereas the cluster core radius of 4.2 pc is in excellent agreement with those determined for the previously 12 known EMSTO LMC clusters. © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00358711_v430_n3_p2358_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 Galaxies: individual: LMC
Galaxies: Star clusters: general
Magellanic Clouds
Techniques: Photometric
spellingShingle Galaxies: individual: LMC
Galaxies: Star clusters: general
Magellanic Clouds
Techniques: Photometric
Piatti, A.E.
A new extended main-sequence turnoff star cluster in the large magellanic cloud
topic_facet Galaxies: individual: LMC
Galaxies: Star clusters: general
Magellanic Clouds
Techniques: Photometric
description We present results on the age and metallicity estimates of the poorly studied Large Magellanic Cloud (LMC) cluster SL 529, from CCD SDSS gr photometry obtained at the Gemini South telescope with the GMOS attached. The cluster main-sequence turnoffs (MSTO) region possesses an extended structure, with an age spread (~0.5 Gyr) bigger than the mean age width of known extended MSTO (EMSTO) LMC clusters. We report for the first time a mean cluster age of 2.25 Gyr and a mean cluster metallicity of Z = 0.004, which place it as the most metal-poor and oldest cluster in the EMSTO LMC cluster group. In addition, the cluster red clump appears to be formed by two concentrations of stars - although it is not clear whether this feature can be caused, in part, by binary interactions and mergers - whereas the cluster core radius of 4.2 pc is in excellent agreement with those determined for the previously 12 known EMSTO LMC clusters. © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.
format JOUR
author Piatti, A.E.
author_facet Piatti, A.E.
author_sort Piatti, A.E.
title A new extended main-sequence turnoff star cluster in the large magellanic cloud
title_short A new extended main-sequence turnoff star cluster in the large magellanic cloud
title_full A new extended main-sequence turnoff star cluster in the large magellanic cloud
title_fullStr A new extended main-sequence turnoff star cluster in the large magellanic cloud
title_full_unstemmed A new extended main-sequence turnoff star cluster in the large magellanic cloud
title_sort new extended main-sequence turnoff star cluster in the large magellanic cloud
url http://hdl.handle.net/20.500.12110/paper_00358711_v430_n3_p2358_Piatti
work_keys_str_mv AT piattiae anewextendedmainsequenceturnoffstarclusterinthelargemagellaniccloud
AT piattiae newextendedmainsequenceturnoffstarclusterinthelargemagellaniccloud
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