The usage of the Asymptotic Giant Branch Star Features As Age Indicators in Post-Starburst Galaxies

Details The usage of the Asymptotic Giant Branch Star Features As Age Indicators in Post-Starburst Galaxies The usage of the Asymptotic Giant Branch Star Features As Age Indicators in Post-Starburst Galaxies

1999-06-08

arxiv.org/abs/astro-ph/9906147v1

Astronomy and Astrophysics

Astrophysics

4 pages, to appear in the PASP Conference Proceedings series of the Workshop "Spectrophotometric dating of stars and galaxies"

Scientific paper

We investigate techniques that can be used to determine ages of recently star forming regions during the phase dominated in the near-IR by the asymptotic giant branch stars (10^8-10^9 yrs). In particular, we present selected near-IR spectroscopic features that identify the contribution of O-rich and C-rich AGB variable stars to the integrated spectra of post-starbursts. The observational strategy based on those features is presented. We discuss the robustness of our selected features in constraining the ages of the post-starburst population depending on its physical environment and on underlying evolved populations. The interplay between the integrated features of populations and the stellar parameters is discussed.

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