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Astron. Astrophys. 344, L21-L24 (1999)


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Letter to the Editor

How to search for AGB stars in near-IR post-starburst spectra

A. Lançon 1, M. Mouhcine 1, M. Fioc *  2 and D. Silva 3

1 Observatoire Astronomique, Université L. Pasteur & CNRS: UMR 7550, 11 rue de l'Université, F-67000 Strasbourg, France
2 Institut d'Astrophysique de Paris, 98 bis Bd. Arago, F-75014 Paris, France
3 European Space Observatory, Karl-Schwarzschild-Strasse 2, D-85748 Garching, Germany

Received 18 January 1999 / Accepted 23 February 1999

Abstract

Based on evolutionary spectral synthesis models explicitly including the spectra of variable AGB stars, we select near-IR features that dentify the strong O-rich or C-rich AGB contributions to the near-IR light of post-starburst populations. AGB temperature scales and lifetimes remain major sources of uncertainties. We discuss applications and suggest massive post-starburst clusters as prime targets for observational tests.

Key words: stars: AGB and post-AGB – galaxies: star clusters – galaxies: stellar content – infrared: galaxies

* Now at: NASA/GSFC, Greenbelt, MD 20771, USA

Send offprint requests to: A. Lançon

© European Southern Observatory (ESO) 1999

Online publication: March 18, 1999

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