Abundance determination of A, Am and F stars in the Pleiades and Coma Berenices clusters

M. Gebran (1) , R. Monier (2) , Olivier Richard (1)

1 GRAAL - Groupe de Recherche en Astronomie et Astrophysique du Languedoc
2 LUAN - Laboratoire Universitaire d'Astrophysique de Nice

Abundances of 18 chemical elements have been derived for 27 A/Am and 16 F stars members of the Pleiades and Coma Berenices open clusters. We have specifically computed, with the Montrèal code, a series of evolutionary models for two A star members of these two clusters. None of the models reproduces entirely the overall shape of the abundance patterns. The inclusion of competing processes such as rotational mixing in the radiative zones of these stars seems necessary to improve the agreement between observed and predicted abundance patterns.

Mots clés: stars: abundances; diffusion; open clusters and associations: individual: Coma Berenices; Pleiades

Domaines: Astrophysique [astro-ph]

M. Gebran, R. Monier, Olivier Richard. Abundance determination of A, Am and F stars in the Pleiades and Coma Berenices clusters. CP#AP Workshop, Sep 2007, Vienne, Austria. ⟨hal-01994356⟩