On the influence of Stark broadening on SiI lines in stellar atmospheres

被引：21

作者：

Dimitrijevic, MS

Ryabchikova, T

Popovic, LC

Shulyak, D

Tsymbal, V

机构：

[1] Astron Observ, YU-11160 Belgrade 74, Serbia, Serbia

[2] Russian Acad Sci, Inst Astron, Moscow 119017, Russia

[3] Univ Vienna, Inst Astron, A-1180 Vienna, Austria

[4] Tavrian Natl Univ, UA-330000 Simferopol, Crimea, Ukraine

来源：

ASTRONOMY & ASTROPHYSICS | 2003年 / 404卷 / 03期

关键词：

stars : chemically peculiar; line : profiles; atomic processes;

D O I：

10.1051/0004-6361:20030561

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the influence of Stark broadening and stratification effects on Si I lines in the rapidly oscillating ( roAp) star 10 Aql, where the Si I 6142.48 Angstrom and 6155.13 Angstrom lines are asymmetrical and shifted. First we have calculated Stark broadening parameters using the semiclassical perturbation method for three Si I lines: 5950.2 Angstrom, 6142.48 Angstrom and 6155.13 Angstrom. We revised the synthetic spectrum calculation code taking into account both Stark width and shift for these lines. From the comparison of our calculations with the observations we found that Stark broadening + the stratification effect can explain asymmetry of the Si I 6142.48 Angstrom and 6155.13 Angstrom lines in the atmospere of roAp star 10 Aql.

引用

页码：1099 / 1106

页数：8

共 30 条

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[Anonymous], 1966, NBS MONOGRAPH

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