Chemical composition of the atmospheres of red giants with high space velocities |
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Authors: | Yu V Pakhomov |
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Institution: | 1.Institute of Astronomy,Russian Academy of Sciences,Moscow,Russia |
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Abstract: | The results of a comparative analysis of the elemental abundances in the atmospheres of 14 red giants with high Galactic space
velocities are presented. For almost all of the chemical elements considered, the their abundance trends with metallicity
correspond to those constructed for thick-disk dwarfs. In the case of sodium, the main factor affecting the Na/Fe] abundance
in the stellar atmosphere for red giants is the surface gravity that characterizes the degree of development of the convective
envelope. The difference between the Na/Fe] abundances in the atmospheres of thin- and thick-disk red giants has been confirmed. |
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