Chemical Composition of the RS CVn-type Star 33 Piscium

Details Chemical Composition of the RS CVn-type Star 33 Piscium Chemical Composition of the RS CVn-type Star 33 Piscium

2011-05-27

arxiv.org/abs/1105.5650v2

Baltic Astronomy, 2011, Vol. 20, p. 53-63

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

Scientific paper

Abundances of 22 chemical elements, including the key elements and isotopes such as 12C/13C, N and O, are investigated in the spectrum of 33 Psc, a single-lined RS CVn-type binary of low magnetic activity. The high resolution spectra were observed on the Nordic Optical Telescope and analyzed with the MARCS model atmospheres. The following main parameters have been determined: T_eff = 4750 K, log g = 2.8, [Fe/H] = -0.09, [C/Fe] = -0.04, [N/Fe] = 0.23, [O/Fe] = 0.05, C/N = 2.14, 12C/13C = 30, which show the first-dredge-up mixing signatures and no extra-mixing.

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