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首页> 外文期刊>Advances in space research >Eruption of the magnetic flux rope in a quick decaying active region
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Eruption of the magnetic flux rope in a quick decaying active region

机译：在快速衰减的活动区域中磁通绳的爆发

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摘要

An isolated and quickly decaying active region (NOAA 9729) was observed as it passed across the solar disk. There was only one CME associated with the active region, which provides a good opportunity to investigate the whole process of the CME. A filament in this active region was observed to rise rapidly before stalling and disintegrating into flare loops. The rising filament seen in EIT images separates into two parts just before eruption. A new filament reforms several hours later after the CME; the axis of this new filament is rotated clockwise approximately 22° compared with that of the first filament,due to a changed orientation of the polarity inversion line. We also observed a bright transient slightly S-shaped X-ray sigmoid, which appears immediately after the filament eruption. The X-ray sigmoid quickly develops into a soft X-ray cusp and rises before dropping back down. Two magnetic cancelation regions were observed clearly just before filament eruption. The eruption process of the sigmoid structure in this quick decaying active region could be explained by using the 3D Tether-Cutting model. The magnetic flux rope erupted as the magnetic helicity approached its maximum and the normalized helicity was -0.036 when the magnetic flux rope erupted, which is an order of magnitude smaller than the simulation results of the kink and torus instability, but is close to the predicted value of Zhang et al. (2008) based on the theoretical non-linear force-free model.
机译：当它穿过太阳盘时，观察到一个孤立且快速衰减的有源区域（NOAA 9729）。活动区域只有一个CME，这为研究CME的整个过程提供了一个很好的机会。观察到该活性区域中的细丝在失速和崩解成火炬环之前迅速上升。在EIT图像中看到的上升的细丝就在喷发之前分成两部分。在CME之后的几个小时，一条新的灯丝将重新形成；由于极性反转线的方向发生了变化，因此新灯丝的轴线与第一灯丝的轴线相比，顺时针旋转了大约22°。我们还观察到了明亮的，短暂的，呈S形的X射线乙状结肠，它在细丝喷发后立即出现。 X射线乙状结肠迅速发展成柔软的X射线尖端，并在回落之前上升。恰在灯丝喷发之前清楚地观察到两个磁性消除区域。乙状结肠结构在这个快速衰减的活动区域中的喷发过程可以通过使用3D系绳切割模型来解释。当磁通量达到最大值时，磁通量绳爆发，归一化的螺旋度为-0.036，比扭结和环面不稳定性的模拟结果小一个数量级，但接近预测值张等人的价值。 （2008年）基于理论上的非线性无力模型。

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  • 来源
    《Advances in space research》 |2015年第6期|1553-1562|共10页
  • 作者

    Shangbin Yang; Wenbin Xie; Jihong Liu;

  • 作者单位

    Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China;

    Jilin Normal University, 136000 Siping, Jilin Province, China,Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China;

    Shijiazhuang University, 050035 Shijiazhuang, Hebei Province, China,Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Sun; Magnetic helicity; CMEs; Filament eruption;

    机译：太阳;磁性螺旋CME;细丝喷发;

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