The Hα line-profile variations for B-emission stars

被引：0
|
作者：
Setiadi, W. C. [1 ]
Aprilia [1 ]
机构：
[1] Inst Technol Bandung, Fac Math & Nat Sci, Dept Astron, Jalan Ganesha 10, Bandung, Indonesia
来源：
6TH INTERNATIONAL CONFERENCE ON MATHEMATICS AND NATURAL SCIENCES | 2019年 / 1127卷
关键词：
D O I：
10.1088/1742-6596/1127/1/012056
中图分类号：
O29 [应用数学];
学科分类号：
070104 ;
摘要：
Spectroscopic variations of Ha line profiles from 9 B-emission (Be) stars in the southern sky, taken from the 5th revised of Bright Star Catalogue year 1991, are analyzed. These variations, emission and/or absorption lines, are due to the presence of the circumstellar envelopes surrounding the stars and also describe the phase changing/evolution phases of the stellar spectra if we have data for some years. Therefore, we compare the spectra to data from BeSS database and references for the recent years. Five stars show double-peaked emission line profile of Ha. One star shows Be phase with a single peaked Ha emission line, and three stars show evolution phases of the Ha line profile. By studying this evolution of the line variations, we can fit the suitable envelope models for each star taken from references.
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页数：4
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