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Near-IR age-dating of red supergiant-dominated stellar populations |
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| Authors: | Ariane Lançon Jay S Gallagher Moustapha Mouhcine Linda J Smith Djazia Ladjal Richard de Grijs |
| Institution: | 1. Observatoire de Strasbourg, Université de Strasbourg et CNRS (UMR 7550), Strasbourg, France 2. Department of Astronomy, University of Wisconsin-Madison, Madison, WI, USA 3. Astrophysics Research Institute, Liverpool John Moores University, Liverpool, UK 4. Space Telescope Science Institute and European Space Agency, Baltimore, MD, USA 5. Department of Physics and Astronomy, University College London, London, UK 6. Institute of Astronomy, Katholieke Universiteit, Leuven, Belgium 7. Department of Physics and Astronomy, The University of Sheffield, Sheffield, UK 8. National Astronomical Observatories, Chinese Academy of Sciences, Beijing, China |
| Abstract: | We present new spectral synthesis models for solar metallicity stellar populations, based on a library of stellar spectra that extends across near-IR wavelengths out to 2.4 µm at a resolution approaching 1000. We show that the spectra of massive star clusters in the starburst galaxy M 82 can be reproduced very well with these models. We compare near-IR spectroscopic ages with optical ages, and discuss the main sources of (systematic) errors that still affect those ages. |
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