Modelling the Near-IR Spectra of Red Supergiant-dominated Populations
Abstract
We report on recent progress in the modelling of the near-IR spectra of young stellar populations, i.e. populations in which red supergiants (RSGs) are dominant. First, we discuss the determination of fundamental parameters of RSGs from PHOENIX model fits to their near-IR spectra; RSG-specific surface abundances are accounted for and effects of the microturbulence parameter are explored. New population synthesis predictions are then described and, as an example, it is shown that the spectra of young star clusters in M 82 can be reproduced very well from 0.5 to 2.4 μm. We warn of remaining uncertainties in cluster ages.
- Publication:
-
Stellar Populations as Building Blocks of Galaxies
- Pub Date:
- August 2007
- DOI:
- 10.1017/S1743921307007673
- arXiv:
- arXiv:0704.0401
- Bibcode:
- 2007IAUS..241..152L
- Keywords:
-
- galaxies: stellar content;
- galaxies: starburst;
- galaxies: star clusters;
- galaxies: individual (M82);
- infrared: galaxies;
- infrared: stars;
- stars: supergiants;
- Astrophysics
- E-Print:
- Proceedings of IAU Symp. 241 on Stellar Populations as Building Blocks of Galaxies, ed. A. Vazdekis et al. (2007). 4 pages, 6 postscript figures, uses iaus.cls.