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Age and metallicity of star clusters in the Small Magellanic Cloud from integrated spectroscopy

Published online by Cambridge University Press:  13 April 2010

Bruno Dias ,
Paula Coelho ,
Leandro Kerber ,
Beatriz Barbuy  and
Thais Idiart
Bruno Dias
Affiliation:
Instituto de Astronomia, Geofísica e Ciências Atmosféricas, Universidade de Sao Paulo, Rua do Matão, 1226, Sao Paulo, Brazil, 05508-900 email: bdias@astro.iag.usp.br, barbuy@astro.iag.usp.br, idiart@astro.iag.usp.br
Paula Coelho
Affiliation:
Universidade Cruzeiro do Sul, Conselho de Ensino, Pesquisa e Extensão., Rua Galvão Bueno, 868, Sao Paulo, Brazil, 01506-000 email: pcoelho@iap.fr
Leandro Kerber
Affiliation:
Universidade Estadual de Santa Cruz. km 16, Rodovia Ilhús-Itabuna, Ilheus, Brazil, 45662-000 email: kerber@astro.iag.usp.br
Beatriz Barbuy
Affiliation:
Instituto de Astronomia, Geofísica e Ciências Atmosféricas, Universidade de Sao Paulo, Rua do Matão, 1226, Sao Paulo, Brazil, 05508-900 email: bdias@astro.iag.usp.br, barbuy@astro.iag.usp.br, idiart@astro.iag.usp.br
Thais Idiart
Affiliation:
Instituto de Astronomia, Geofísica e Ciências Atmosféricas, Universidade de Sao Paulo, Rua do Matão, 1226, Sao Paulo, Brazil, 05508-900 email: bdias@astro.iag.usp.br, barbuy@astro.iag.usp.br, idiart@astro.iag.usp.br
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Abstract

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Analysis of integrated spectra of star clusters in the Magellanic Clouds can bring important information for studies on the chemical evolution of the Clouds. The aim of the present work is to derive ages and metallicities from integrated spectra of 15 star clusters in the Small Magellanic Cloud (SMC), some of them not studied so far. Making use of a full spectrum fitting technique, we compared the integrated spectra of the sample clusters to three different sets of single stellar population models available in the literature. We derived ages and metallicities for the sample clusters employing the codes STARLIGHT and ULySS. Out of the 15 clusters in our sample, 9 are old/intermediate age clusters and 6 are young clusters. We point out the results for the newly identified as old/intermediate age clusters HW1, NGC 152, Lindsay 3 and 11. We also confirm old ages for NGC 361, NGC 419 and Kron 3, and the oldest well-known SMC cluster NGC 121.

Keywords

(galaxies:) Magellanic Cloudsgalaxies: star clusters
Type
Poster Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Symposium S262: Stellar Populations – Planning for the Next Decade , August 2009 , pp. 329 - 330
Copyright
Copyright © International Astronomical Union 2010

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