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dc.contributor.author
Piatti, Andres Eduardo
dc.contributor.author
Claria Olmedo, Juan Jose
dc.contributor.author
Parisi, Maria Celeste
dc.contributor.author
Ahumada, Andrea Veronica
dc.date.available
2017-07-05T18:37:42Z
dc.date.issued
2011-02
dc.identifier.citation
Piatti, Andres Eduardo; Claria Olmedo, Juan Jose; Parisi, Maria Celeste; Ahumada, Andrea Veronica; First estimates of the fundamental parameters of three Large Magellanic Cloud clusters; University of Chicago Press; Publications of the Astronomical Society of the Pacific; 123; 903; 2-2011; 519-530
dc.identifier.issn
0004-6280
dc.identifier.uri
http://hdl.handle.net/11336/19623
dc.description.abstract
As part of an ongoing project to investigate the cluster formation and chemical evolution history in the Large Magellanic Cloud (LMC), we have used the CTIO 0.9 m telescope to obtain CCD imaging in the Washington system of NGC 2161, SL 874, and KMHK 1719—three unstudied star clusters located in the outer region of the LMC. We measured T1 magnitudes and C T1 colors for a total of 9611 stars distributed throughout cluster areas of 13:6 × 13:6 arcmin2. Cluster radii were estimated from star counts distributed throughout the entire observed fields. Careful attention was paid to setting apart the cluster and field star distributions so that statistically cleaned color-magnitude diagrams (CMDs) were obtained. Based on the best fits of isochrones computed by the Padova group to the (T1, C T1) CMDs, the δT1 index, and the standard giant branch procedure, ages and metallicities were derived for the three clusters. The different methods for both age and metallicity determination are in good agreement. The three clusters were found to be of intermediate-age (∼1 Gyr) and relatively metal-poor (½Fe=H ∼ 0:7 dex). By combining the current results with others available in the literature, a total sample of 45 well-known LMC clusters older than 1 Gyr was compiled. By adopting an age interval varying in terms of age according to a logarithmic law, we built the cluster age histogram, which statistically represents the intermediate-age and old stellar populations in the LMC. Two main cluster formation episodes that peaked at t ∼ 2 and ∼14 Gyr were detected. The present cluster age distribution was compared with star formation rates that were analytically derived in previous studies.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
University of Chicago Press
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Clusters
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Magellanic Clouds
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Photometry
dc.subject.classification
Astronomía
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Ciencias Físicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
First estimates of the fundamental parameters of three Large Magellanic Cloud clusters
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-07-05T15:47:17Z
dc.journal.volume
123
dc.journal.number
903
dc.journal.pagination
519-530
dc.journal.pais
Estados Unidos
dc.journal.ciudad
Chicago
dc.description.fil
Fil: Piatti, Andres Eduardo. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
dc.description.fil
Fil: Claria Olmedo, Juan Jose. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Parisi, Maria Celeste. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Ahumada, Andrea Veronica. European Southern Observatory; Chile. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.journal.title
Publications of the Astronomical Society of the Pacific
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1086/659848
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1086/659848/meta
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