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arXiv 1603.09121astro-ph.SR
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KIC 9641031的详细色球活性性质

Detailed Chromospheric Activity Nature of KIC 9641031

Ezgi Yoldaş, Hasan Ali Dal

摘要:

本研究以KIC 9641031食双星为研究对象,该食双星具有色球活动分量。从开普勒任务数据库中获取的光变曲线的变化有三种类型,即日食引起的几何变化、自转调制引起的正弦变化和耀斑。考虑到从KIC 9641031的观测开普勒任务数据库中获得的结果,我们提出并讨论了色球活动的细节。由于旋转调制和耀斑事件的正弦光变化分别建模。使用文献中描述的分析模型分离的92个不同的数据子集被单独建模以获得冷点配置。可以看出,只有一个组成部分的系统是色球活动的恒星。在该分量上,在+50度和+100度纬度之间存在两个纵向相隔约180度的活动区,其位置和形式在短时间内迅速变化。探测到240个耀斑并计算了它们的参数。利用这些参数,得到了单相指数关联(OnePhaseExponentialAssociation,以下简称OPEA)函数模型,其中KIC 9641031的平台值为1.232s,半衰期参数为2291.7s。耀斑频率N1被发现是0.41632 h-1,而耀斑频率N2被发现是0.00027。将这些参数与轨道周期变化一起考虑,表明周期变化直接取决于色球活动。将该体系与其类似物进行比较,可以看出KIC 9641031的活性水平明显低于其他体系。

英文摘要:

This study depends on KIC 9641031 eclipsing binary system with a chromospherically active component. There are three type variations, such as geometrical variations due to eclipses, sinusoidal variations due to the rotational modulations and also flares, in the light curves obtained with the data taken from the Kepler Mission Database. Taking into account results obtained from KIC 9641031's observations in the Kepler Mission Database, we present and discuss the details of chromospheric activity. The sinusoidal light variations due to rotational modulation and the flare events were modelled separately. 92 different data subsets separated using the analytic models described in the literature were modelled separately to obtain the cool spot configuration. It is seen that just one component of the system is chromospherically active star. On this component, there are two active regions separated by about 180 deg longitudinally between the latitudes of +50 deg and +100 deg, whose locations and forms are rapidly changing in short time intervals. 240 flares were detected and their parameters were computed. Using these parameters, the One Phase Exponential Association (hereafter OPEA) function model was derived, in which the Plateau value as a saturation level of the flare-equivalent duration was found to be 1.232 s for KIC 9641031, and half-life parameter was found to be 2291.7 s. The flare frequency N1 was found to be 0.41632 h-1, while the flare frequency N2 was found to be 0.00027. Considering these parameters together with the orbital period variations demonstrates that the period variations directly depend on chromospheric activity. Comparing the system with its analogue it is seen that the activity level of KIC 9641031 is remarkablely lower than the others.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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