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dc.contributor.author
Piatti, Andres Eduardo
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dc.contributor.author
Santos Jr, Joâo F. C.
dc.contributor.author
Claria Olmedo, Juan Jose
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dc.contributor.author
Bica, Eduardo
dc.contributor.author
Ahumada, Andrea Veronica
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dc.contributor.author
Parisi, Maria Celeste
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dc.date.available
2017-08-08T19:23:38Z
dc.date.issued
2005-09
dc.identifier.citation
Piatti, Andres Eduardo; Santos Jr, Joâo F. C.; Claria Olmedo, Juan Jose; Bica, Eduardo; Ahumada, Andrea Veronica; et al.; Integrated spectral analysis of 18 concentrated star clusters in the Small Magellanic Cloud; EDP Sciences; Astronomy and Astrophysics; 440; 1; 9-2005; 111-120
dc.identifier.issn
0004-6361
dc.identifier.uri
http://hdl.handle.net/11336/22040
dc.description.abstract
We present in this study flux-calibrated integrated spectra in the range (3600-6800) Å for 18 concentrated SMC clusters. Cluster reddening values were estimated by interpolation between the extinction maps of Burstein & Heiles (1982, AJ, 87, 1165) and Schlegel et al. (1998, ApJ, 500, 525). The cluster parameters were derived from the template matching procedure by comparing the line strengths and continuum distribution of the cluster spectra with those of template cluster spectra with known parameters and from the equivalent width (EW) method. In this case, new calibrations were used together with diagnostic diagrams involving the sum of EWs of selected spectral lines. A very good agreement between ages derived from both methods was found. The final cluster ages obtained from the weighted average of values taken from the literature and the present measured ones range from 15 Mr (e.g. L 51) to 7 Gyr (K 3). Metal abundances have been derived for only 5 clusters from the present sample, while metallicity values directly averaged from published values for other 4 clusters have been adopted. Combining the present cluster sample with 19 additional SMC clusters whose ages and metal abundances were put onto a homogeneous scale, we analyse the age and metallicity distributions in order to explore the SMC star formation history and its spatial extent. By considering the distances of the clusters from the SMC centre instead of their projections onto the right ascension and declination axes, the present age-position relation suggests that the SMC inner disk could have been related to a cluster formation episode which reached the peak ~2.5 Gyr ago. Evidence for an age gradient in the inner SMC disk is also presented.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
EDP Sciences
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Photometry
dc.subject.classification
Astronomía
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dc.subject.classification
Ciencias Físicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Integrated spectral analysis of 18 concentrated star clusters in the Small Magellanic Cloud
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-08-08T14:31:35Z
dc.journal.volume
440
dc.journal.number
1
dc.journal.pagination
111-120
dc.journal.pais
Francia
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dc.journal.ciudad
Paris
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: Santos Jr, Joâo F. C.. Universidade Federal do Minas Gerais; Brasil
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: Bica, Eduardo. Universidade Federal do Rio Grande do Sul; Brasil
dc.description.fil
Fil: Ahumada, Andrea Veronica. 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.journal.title
Astronomy and Astrophysics
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1051/0004-6361:20052982
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2005/34/aa2982-05/aa2982-05.html
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/astro-ph/0507214
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