THE DETERMINATION OF ELEMENT ABUNDANCES IN THE SOLAR NEIGHBORHOOD FROM B-TYPE STELLAR SPECTRA .2. NON-LTE CALCULATIONS FOR AR-II

被引：13
|
作者：
HOLMGREN, DE
BROWN, PJF
DUFTON, PL
KEENAN, FP
机构：
[1] Dept. of Pure and Applied Physics, Queen's University of Belfast, Belfast
来源：
ASTROPHYSICAL JOURNAL | 1990年 / 364卷 / 02期
关键词：
Stars: abundances; Stars: atmospheres; Stars: early-type;
D O I：
10.1086/169448
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Non-LTE radiative transfer calculations for argon are presented for models with effective temperatures in the range 17,500-30,000 K and a logarithmic argon abundance of 6.50 on the scale log [H] = 12. These are used to analyze high-resolution and signal-to-noise observations of weak a Ar II lines in the spectra of B-type stars. A mean argon abundance of 6.50 ± 0.05 dex is found, providing a reliable estimate of the current cosmic argon abundance in the solar neighborhood.
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页码：657 / 662
页数：6
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