论文标题
具有强磁场的低质量恒星的光角色中的长期活性
Long-Term Activity in Photospheres of Low-Mass Stars with Strong Magnetic Fields
论文作者
论文摘要
数十年来，研究了K-M Dwarfs OU GEM，EQ VIR，V1005和AU MIC的平均年度光度的行为。 1989 - 2019年光度数据的主要来源是河马，ASA，KWS数据库。对长期序列的分析表明，全星的平均年亮度各不相同。 OU GEM，V1005 ORI和AU MIC的可能周期的持续时间为40 - 42年，EQ Vir -16。6年，周期幅度为0.09 $^m $ -0.2 $^m $。选定的恒星属于一组红色矮人，平均表面磁场超过几千摩斯。我们检查了9颗恒星，<b> <4 kg，我们检查了周期参数，其持续时间和幅度之间的关系类型。已经注意到，当降低值时，循环幅度和持续时间的增加趋势已被注意到。可以建议，随着表面磁场的增加，它变得更加均匀，并且在这种情况下的活性水平在较小的程度上比在大斑点集中在恒星上的恒星较少。
The behavior of the average annual luminosity of K-M dwarfs OU Gem, EQ Vir, V1005 Ori and AU Mic was studied at time intervals of several decades. The main sources of photometric data for 1989-2019 were the Hipparcos, ASAS, KWS databases. An analysis of long-term series showed that the average annual brightness of all stars varies cyclical. The durations of possible cycles for OU Gem, V1005 Ori and AU Mic are 40-42 years, for EQ Vir - 16.6 years, and amplitudes of cycles are of 0.09$^m$ - 0.2$^m$. The selected stars belong to the group of red dwarfs for which the average surface magnetic field <B> exceeds of several kilogauss. We examined the type of the relationship between the parameters of the cycle, its duration and amplitude, for 9 stars with <B> < 4 kG. A tendency to increasing of the amplitude and duration of the cycle when the value of <B> decrease has been noted. It may be suggested that with an increasing of the surface magnetic field, it becomes more uniform and the level of activity changes in this case in less degrees than on stars with strong local fields concentrated in large spots.
