Chemical composition of AY Ceti: A flaring, spotted star with a white dwarf companion
Abstract
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.
- Publication:
-
Astronomische Nachrichten
- Pub Date:
- December 2011
- DOI:
- 10.1002/asna.201111597
- arXiv:
- arXiv:1201.4699
- Bibcode:
- 2011AN....332..925T
- Keywords:
-
- stars;
- RS CVn binaries;
- abundances;
- binaries: close;
- stars: abundances;
- stars: activity;
- stars: individual (AY Cet);
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- 11 figures