CC BY-NC-ND 4.0 UnportedTautvaišiené, G.Barisevičius, G.Berdyugina, Svetlana V.Chorniy, YuriyIlyin, Ilya V.2018-04-252019-06-282010https://doi.org/10.34657/1424https://oa.tib.eu/renate/handle/123456789/4328Photospheric parameters and chemical composition are determined for the single-lined chromospherically active RS CVn-type star λ And (HD 222107). From the high resolution spectra obtained on the Nordic Optical Telescope, abundances of 22 chemical elements and isotopes, including such key elements as 12C, 13C, N and O, were investigated. The differential line analysis with the MARCS model atmospheres gives Teff = 4830 K, log g = 2.8, [Fe/H] = -0.53, [C/Fe] = 0.09, [N/Fe] = 0.35, [O/Fe] = 0.45, C/N = 2.21, 12C/13C = 14. The 12C/13C ratio for a star of the RS CVn-type is determined for the first time, and its low value gives a hint that extra-mixing processes may start acting in low-mass chromospherically active stars below the bump of the luminosity function of red giants.application/pdfenghttps://creativecommons.org/licenses/by-nc-nd/4.0/530starsRS CVn binariesabundances starsindividual (λ And = HD 222107)Article