Abundances of A/F and Am/Fm stars in open clusters as constraints to self-consistent models including transport processes
Abstract
We describe the current status of a programme we started a few years ago to observe a large number of A/F and Am/Fm stars in open clusters of various ages. Spectra were obtained with the AURELIE and ELODIE spectrographs at a resolving power of about 40000 and S/N ratios from 100 up to 500. Abundances of 11 chemical elements have been derived by using Takeda's (1995) procedure. A short review on previous abundance determinations of A and F dwarfs in open clusters and a progress report on the current status of this project are presented. New abundance determinations for 24 A and F dwarfs in the Coma Berenices cluster are presented. These abundance determinations serve to set constraints to self-consistent evolutionary models of A and F stars including transport processes.
- Publication:
-
The A-Star Puzzle
- Pub Date:
- December 2004
- DOI:
- 10.1017/S1743921304004570
- Bibcode:
- 2004IAUS..224..209M
- Keywords:
-
- Diffusion;
- stars: abundances;
- stars: chemically peculiar;
- open clusters and associations: individual: (Coma Ber)