Hostname: page-component-78c5997874-4rdpn Total loading time: 0 Render date: 2024-11-14T07:55:00.875Z Has data issue: false hasContentIssue false
  • English
  • Français

Star clusters: age, metallicity and extinction from integrated spectra

Published online by Cambridge University Press:  18 January 2010

Rosa M. González Delgado  and
Roberto Cid Fernandes
Rosa M. González Delgado
Affiliation:
Instituto de Astrofísica de Andalucía–CSIC, Granada, Spain
Roberto Cid Fernandes
Affiliation:
Departamento de Física, Universidade Federal de Santa Catarina, Florianopolis, Brazil
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Integrated optical spectra of star clusters in the Magellanic Clouds and a few Galactic globular clusters are fitted using high-resolution spectral models for single stellar populations. The goal is to estimate the age, metallicity and extinction of the clusters, and evaluate the degeneracies among these parameters. Several sets of evolutionary models that were computed with recent high-spectral-resolution stellar libraries (MILES, GRANADA, STELIB), are used as inputs to the starlight code to perform the fits. The comparison of the results derived from this method and previous estimates available in the literature allow us to evaluate the pros and cons of each set of models to determine star cluster properties. In addition, we quantify the uncertainties associated with the age, metallicity and extinction determinations resulting from variance in the ingredients for the analysis.

Keywords

galaxies: star clustersgalaxies: stellar contentMagellanic Clouds
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Symposium S266: Star clusters: basic galactic building blocks throughout time and space , August 2009 , pp. 403 - 406
Copyright
Copyright © International Astronomical Union 2010

References

Bruzual, G. & Charlot, S. 2003, MNRAS, 344, 1000CrossRefGoogle Scholar
Cerviño, M. & Luridiana, V. 2006, A&A, 413, 145Google Scholar
Cid Fernandes, R., Mateus, A., Sodré, L., Stasińska, G., & Gomes, J. M. 2005, MNRAS, 358, 363CrossRefGoogle Scholar
CidFernandes, R. Fernandes, R. & González Delgado, R. M. 2009, MNRAS, submittedGoogle Scholar
Girardi, L., Chiosi, C., Bertelli, G., & Bressan, A. 1995, A&A, 298, 87Google Scholar
González Delgado, R. M., Cerviño, M., Martins, L. P., Leitherer, C., & Hauschildt, P. H. 2005, MNRAS, 357, 945CrossRefGoogle Scholar
GonzálezDelgado, R. M. Delgado, R. M. 2009, in: Pérez, E., de Grijs, R. & González–Delgado, R. M. (eds.), Young massive star clusters: initial conditions and environments, ApSS, 324, 231Google Scholar
GonzálezDelgado, R. M. Delgado, R. M. & Cid Fernandes, R. 2009, MNRAS, submittedGoogle Scholar
Le Borgne, J. -F., Bruzual, G., Pelló, R., Lançon, A., Rocca–Volmerange, B., Sanahuja, B., Schaerer, D., Soubiran, C., & Vílchez–Gómez, R. 2003, A&A, 402, 433Google Scholar
Leonardi, A. J. & Rose, J. A. 2003, ApJ, 126, 1811CrossRefGoogle Scholar
Koleva, M., Prugniel, P., Ocvirk, P., Le Borgne, D., & Soubiran, C. 2008, MNRAS, 385, 1998CrossRefGoogle Scholar
Martins, L. P., González Delgado, R. M., Leitherer, C., Cerviño, M., & Hauschildt, P. H. 2005, MNRAS, 358, 49CrossRefGoogle Scholar
Olszewski, E. W., Schommer, R. A., Suntzeff, N. B., & Harris, H. C. 1991, AJ, 101, 515CrossRefGoogle Scholar
Vazdekis, A., et al. 2009, MNRAS, submittedGoogle Scholar