Abundances in Przybylski's star

被引:135
作者
Cowley, CR
Ryabchikova, T
Kupka, F
Bord, DJ
Mathys, G
Bidelman, WP
机构
[1] Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA
[2] Russian Acad Sci, Astron Inst, Moscow 109017, Russia
[3] Univ Vienna, Inst Astron, A-1180 Vienna, Austria
[4] Univ Michigan, Dept Nat Sci, Dearborn, MI 48128 USA
[5] European So Observ, Santiago 19, Chile
[6] Case Western Reserve Univ, Dept Astron, Cleveland, OH 44106 USA
关键词
stars : abundances; stars : chemically peculiar; stars : individual : HD101065;
D O I
10.1046/j.1365-8711.2000.03578.x
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We have derived abundances for 54 elements in the extreme roAp star HD 101065. ESO spectra with a resolution of about 80 000, and S/N of 200 or more were employed. The adopted model has T(eff)=6600 K, and log(g)=4.2. Because of the increased line opacity and consequent low gas pressure, convection plays no significant role in the temperature structure. Lighter elemental abundances through the iron group scatter about standard abundance distribution (SAD) (solar) values. Iron and nickel are about one order of magnitude deficient while cobalt is enhanced by 1.5 dex. Heavier elements, including the lanthanides, generally follow the solar pattern but enhanced by 3 to 4 dex. Odd-Z elements are generally less abundant than their even-Z neighbours. With a few exceptions (e.g. Yb), the abundance pattern among the heavy elements is remarkably coherent, and resembles a displaced solar distribution.
引用
收藏
页码:299 / 309
页数:11
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