Metal abundances of A-type stars in galactic clusters. II. Pleiades, Coma Berenices, Hyades, and Praesepe

Details Metal abundances of A-type stars in galactic clusters. II. Pleiades, Coma Berenices, Hyades, and Praesepe Metal abundances of A-type stars in galactic clusters. II. Pleiades, Coma Berenices, Hyades, and Praesepe

Apr 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26a...332..224h&link_type=abstract

Astronomy and Astrophysics, v.332, p.224-234 (1998)

Astronomy and Astrophysics

Astrophysics

28

Open Clusters: Pleiades, Coma, Hyades, Praesepe, Stars: Abundances, Chemically Peculiar

Scientific paper

A study of chemical composition for 23 A-type stars in four nearby open clusters (Pleiades, Coma, Hyades and Praesepe) has derived detailed abundances for Mg, Ca, Sc, Cr, Fe, and Ni from high resolution spectroscopy. These results are discussed using the microscopic diffusion model, which yields time-dependent element stratifications as in the case of Am stars. For the Pleiades, the youngest cluster, we find several atypical abundance patterns, which may be transient phases of the Am phenomenon. The members of the older clusters show globally more classical patterns. Based on observations collected at the Observatoire de Haute-Provence (France)

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