CHEMICAL ABUNDANCES FOR A-AND F-TYPE SUPERGIANT STARS

被引：0
|
作者：
Molina, R. E. [1 ]
Rivera, H. [1 ]
机构：
[1] Univ Nacl Expt Tachira, Lab Invest Fis Aplicada & Computac, San Cristobal, Tachira, Venezuela
来源：
REVISTA MEXICANA DE ASTRONOMIA Y ASTROFISICA | 2016年 / 52卷 / 02期
关键词：
stars: abundances; stars: atmospheres; stars: evolution; supergiants; M-CIRCLE-DOT; RADIAL-VELOCITIES; SPECTRAL CLASSIFICATION; STELLAR ABUNDANCES; SODIUM ENRICHMENT; OXYGEN ABUNDANCES; PARAMETERS; NITROGEN; CARBON; CNO;
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present the stellar parameters and elemental abundances of a set of A-F-type supergiant stars HD 45674, HD 180028, HD 194951 and HD 224893 using high resolution (R approximate to 42, 000) spectra taken from ELODIE library. We present the first results of the abundance analysis for HD 45674 and HD 224893. We reaffirm the abundances for HD 180028 and HD 194951 studied previously by Luck. Alpha elements indicate that the objects belong to the thin disc population. Their abundances and their location on the Hertzsprung-Russell diagram seem to indicate that HD 45675, HD 194951 and HD 224893 are in the post-first dredge-up (post-1DUP) phase, and that they are moving in the red-blue loop region. HD 180028, on the contary, shows typical abundances of Population I, but its evolutionary status cannot be satisfactorily defined.
引用
收藏
页码：399 / 411
页数：13
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