Chemical composition of the atmospheres of red giants with high space velocities

Details Chemical composition of the atmospheres of red giants with high space velocities Chemical composition of the atmospheres of red giants with high space velocities

Feb 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012astl...38..101p&link_type=abstract

Astronomy Letters, Volume 38, Issue 2, pp.101-116

Astronomy and Astrophysics

Astronomy

Stellar Spectroscopy, Stellar Atmospheres, Red Giants, Stellar Evolution, Kinematics, Galactic Chemical Evolution

Scientific paper

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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