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

Autor(es)

Dias, B. ^[1] ; Coelho, P. ^[2] ; Barbuy, B. ^[1] ; Kerber, L. ^{[1, 3]} ; Idiart, T. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Astron, BR-05508090 Sao Paulo - Brazil

^[2] Univ Cruzeiro Sul, BR-01506000 Sao Paulo - Brazil

^[3] Univ Estadual Santa Cruz, BR-45662000 Ilheus, Bahia - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Astronomy & Astrophysics; v. 520, SEP-OCT 2010.
• Citações Web of Science: 19

Resumo

Context. Analysis of ages and metallicities of star clusters in the Magellanic Clouds provide information for studies on the chemical evolution of the Clouds and other dwarf irregular galaxies. Aims. The aim is to derive ages and metallicities from integrated spectra of 14 star clusters in the Small Magellanic Cloud, including a few intermediate/old age star clusters. Methods. 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, using two fitting codes available in the literature. Results. We derive the ages and metallicities of 9 intermediate/old age clusters, some of them previously unstudied, and 5 young clusters. Conclusions. We point out the interest of the newly identified as intermediate/old age clusters HW1, NGC 152, Lindsay 3, Lindsay 11, and Lindsay 113. We also confirm the old ages of NGC 361, NGC 419, Kron 3, and of the very well-known oldest SMC cluster, NGC 121. (AU)

• Processo FAPESP: 98/10138-8 - Espectroscopia de média e alta resolução: abundâncias químicas e populações estelares
• Beneficiário: Beatriz Leonor Silveira Barbuy
• Modalidade de apoio: Auxílio à Pesquisa - Regular