Chemical composition of AY Ceti: A flaring, spotted star with a white dwarf companion

被引：1
|
作者：
Tautvaisiene, G. [1 ]
Barisevicius, G. [1 ]
Berdyugina, S. [2 ]
Ilyin, I. [3 ]
Chorniy, Y. [1 ]
机构：
[1] Vilnius Univ, Inst Theoret Phys & Astron, LT-01108 Vilnius, Lithuania
[2] Kiepenheuer Inst Sonnenphys, D-79104 Freiburg, Germany
[3] Leibniz Inst Astrophys Potsdam, D-14482 Potsdam, Germany
来源：
ASTRONOMISCHE NACHRICHTEN | 2011年 / 332卷 / 9-10期
关键词：
binaries: close; stars: abundances; stars: activity; stars: individual (AY Cet); CHROMOSPHERICALLY ACTIVE STARS; RS CVN BINARIES; LITHIUM; PARAMETERS; MASS; ROTATION; GIANTS; TEMPERATURE; VARIABILITY; ABUNDANCES;
D O I：
10.1002/asna.201111597
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The detailed chemical composition of the atmosphere AY Cet (HD7672) 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 C-12, C-13, 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 C-12/C-13 = 21. Despite the high chromospheric activity, the optical spectrum of AYCet provides a chemical composition typical for first ascent giants after the first dredge-up. (C) 2011 WILEY-VCH Verlag GmbH&Co. KGaA, Weinheim
引用
收藏
页码：925 / 932
页数：8
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