A cool R Coronae Borealis star ZUMi

被引：0
|
作者：
Kipper, Tonu [1 ]
Klochkova, Valentina G.
机构：
[1] Tartu Observ, EE-61602 Toravere, Estonia
[2] RAS, Special Astrophys Observ, Nizhnii Arkhyz 369167, Russia
来源：
BALTIC ASTRONOMY | 2006年 / 15卷 / 04期
关键词：
stars : atmospheres; stars : individual (ZUMi);
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
High resolution spectra of a R CrB type star Z UMi are analyzed. The atmospheric parameters of ZUMi are estimated - T-eff = 5250 +/- 250 K and log g = 0.5 +/- 0.3. This places Z UMi among the coolest R CrB stars. The hydrogen deficiency of Z UMi is confirmed. The abundances of other elements resemble those found for the minority group of R CrB stars. We note very low iron abundance, [Fe/H] = -1.85, and an excess of lithium, [Li/Fe] = +1.9.
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收藏
页码：531 / 537
页数：7
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