A period study of the RS CVn-type binary ER Vulpeculae

被引：0
|
作者：
Qian, SB [1 ]
Liu, QY [1 ]
Yang, YL [1 ]
机构：
[1] Acad Sinica, Yunnan Observ, Kunming 650107, Peoples R China
来源：
ASTROPHYSICS AND SPACE SCIENCE | 1998年 / 257卷 / 01期
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D O I：
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中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Many available published times of light minima of the late-type binary system ER Vul have been compiled and analyzed using a new method proposed by Kalimeris et al. (1994). It was shown that the orbital period of the system oscillation with a period of about 30.6 years and an amplitude of 3.2 x 10(-6) days while it undergoes a constant period decrease of about dP/P = 7.84 x 10(-8) day/year. The prospective physical mechanisms that could have modulated the orbital period behaviour (periodic or non-periodic), have been studied. We found that a combination of a magnetic activity cycle mechanism and an enhanced stellar wind could explain satisfactorily the period change.
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页码：1 / 10
页数：10
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