Superfast Line Profile Variations in the Spectra of OBA Stars. III. A0 Star α2 Cvn, New Results

被引：5
|
作者：
Kholtygin, A. F. [1 ]
Moiseeva, A. V. [2 ]
Yakunin, I. A. [1 ,2 ]
Hubrig, S. [3 ]
机构：
[1] St Petersburg State Univ, St Petersburg 199034, Russia
[2] Russian Acad Sci, Special Astrophys Observ, Nizhnii Arkhyz 369167, Russia
[3] Leibniz Inst Astrophys Potsdam AIP, D-14482 Potsdam, Germany
来源：
ASTROPHYSICAL BULLETIN | 2020年 / 75卷 / 03期
关键词：
stars:variability; pulsations; stars: magnetic field; stars: chemically peculiar; stars: individual: alpha(2) CVn; MAIN STELLAR SPECTROGRAPH; MAGNETIC-FIELD MEASUREMENTS; VOLUME-LIMITED SURVEY; RADIAL-VELOCITY; MCP STARS; 100; PC; VARIABILITY;
D O I：
10.1134/S1990341320030086
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
This work is a continuation of the studies of the ultrafast variability of line profiles in the spectra of early-type stars. Line profile variations in the spectrum a chemically peculiar A0Vp star alpha(2) CVn are investigated using the January 6, 2020 observations carried out with the 6-meter BTA telescope at SAO RAS equipped with the MSS spectrograph. Regular short-term periodic variations of the H beta, FeII, and CrII lines were detected with periods ranging from 4 to 140 minutes. The magnetic field of the star was determined for all observations. The average measured longitudinal magnetic field component over the entire duration of observations is about 600 G, which is close to the value expected from the well-known magnetic field phase curve.
引用
收藏
页码：284 / 293
页数：10
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