A study of red giants in the fields of open clusters. Cluster members |
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| Authors: | Yu. V. Pakhomov L. I. Antipova A. A. Boyarchuk D. V. Bizyaev G. Zhao Y. Liang |
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| Affiliation: | (1) Institute of Astronomy, Russian Academy of Sciences, ul. Pyatnitskaya 48, Moscow, 119017, Russia;(2) National Optical Astronomical Observatory, North Cherry Ave. 950, Tucson, AZ 85719, USA;(3) Sternberg Astronomical Institute, Moscow University, Universitetskii pr. 13, Moscow, 119992, Russia;(4) National Astronomical Observatories of China, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, 100012, China |
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| Abstract: | We present the results of a comparative analysis of the atmospheric chemical abundances of red giants in several open clusters: the Hyades, Collinder 350, NGC 6475, and Ruprecht 147. We determined the atmospheric parameters of all the stars and the elemental abundances in their atmospheres, as well as their masses, Galactic velocities, and the elements of their orbits in the Galaxy. The observed excess [Na/Fe] and [Eu/Fe] abundances in the atmospheres of Hyades giants suggests that matter later used for star formation had been enriched in the ejecta from type II supernovae. |
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