Chemical composition of AY Ceti: A flaring, spotted star with a white   dwarf companion
  The detailed chemical composition of the atmosphere AY Cet (HD 7672) is determined from a high-resolution spectrum in the optical region. The main atmospheric parameters and the abundances of 22 chemical elements, including key species such as 12C, 13C, N, and O, are determined. A differential line analysis gives T_eff=5080 K, log g=3.0, [Fe/H]=-0.33, [C/Fe]=-0.17, [N/Fe]=0.17, [O/Fe]=0.05, C/N=1.58, and 12C/13C=21. Despite the high chromospheric activity, the optical spectrum of AY Cet provides a chemical composition typical for first ascent giants after the first dredge-up. 
G. Tautvai\v{s}ien\.e, G. Barisevi\v{c}ius, S. Berdyugina, I. Ilyin,   Y. Chorniy
astro-ph.SR