On the chemical composition of the G7IIIa red giant Eta PISCIUM

Details On the chemical composition of the G7IIIa red giant Eta PISCIUM On the chemical composition of the G7IIIa red giant Eta PISCIUM

Dec 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995azh....72..855a&link_type=abstract

Astronomicheskij Zhurnal, vol. 72, p. 855

Astronomy and Astrophysics

Astronomy

2

Red Giant Stars, Stellar Atmospheres, Chemical Composition, Atmospheric Models, Stellar Composition, Ccd Cameras, Plasma Turbulence

Scientific paper

CCD observations are used to analyze the atmosphere of the G7IIIa giant Eta Psc by the method of model atmospheres. The following atmospheric parameters were obtained: Teff = 4930 K, log g = 2.1, and microturbulent velocity of 1.7 km/s. The abundances of 21 elements in the atmosphere of Eta Psc were determined. The conclusion about a high Li abundance and a high isotopic ratio of C-12/C-13 is validated. A slight excess of Na is reported. The assumption that Eta Psc may belong to a subgroup of mild barium stars is discussed. It is inferred from an analysis of the derived abundances that Eta Psc is a normal red giant.

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