Age and metallicity of star clusters in the Small Magellanic Cloud from integrated spectroscopy
| Autor: | Bruno Dias, Beatriz Barbuy, Paula Coelho, Thais Eunice Pires Idiart, Leandro Kerber |
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| Rok vydání: | 2010 |
| Předmět: |
Physics
Stellar population Metallicity Astronomy FOS: Physical sciences Astronomy and Astrophysics Context (language use) Astrophysics Astrophysics - Astrophysics of Galaxies Hubble sequence symbols.namesake Star cluster Astrophysics - Solar and Stellar Astrophysics Space and Planetary Science Astrophysics of Galaxies (astro-ph.GA) symbols Cluster (physics) Small Magellanic Cloud Spectroscopy Irregular galaxy Solar and Stellar Astrophysics (astro-ph.SR) |
| DOI: | 10.48550/arxiv.1002.4301 |
| Popis: | 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. Comment: 17 pages, 8 figures + 34 figures as appendix, published in A&A |
| Databáze: | OpenAIRE |
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