Hinode observations of flares and active region emergence
Hinode observations of flares and active region emergence
复制标题
日之出观测耀斑和活动区出现
DOI：
10.1088/1742-6596/440/1/012002
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
T.
中科院分区：
文献类型：
--
作者：
Shimizu;T.
在对平静的太阳进行了长而深的极小期观测之后，Hinode现在的观测重点是活跃的太阳，即耀斑和活跃区域。由于其较小的视场仪器和遥测限制，捕捉具有良好观测覆盖范围的主要耀斑需要在Hinode的操作计划方面做出具有挑战性的努力，我们一直在使用最新的AIA和HMI全太阳图像进行定位。此外，如果没有对地表可见的通量出现进行预测，对Hinode来说，捕捉大规模新兴通量活动的初始阶段并不容易。然而，Hinode有一些很好的例子来观察这类事件。在本文中，我们简要讨论两个具体的观察结果；2012年3月的x级耀斑和2009年12月的大规模通量出现。本文给出的耀斑Stokes偏振数据显示，在耀斑发生时，在半影发展和消失的区域，沿剪切磁分布的中性线有明显的气体流动和磁场倾角的变化。从太阳黑子出现的开始到结束，日野三台望远镜都对通量的出现和太阳黑子的形成进行了很好的监测，特别有趣的是在太阳黑子半影出现之前的色球层中发现了一个前兆特征。
After observing the quiet Sun during a long and deep minimum, Hinode's observing priority is now the active Sun, ie, flares and active regions. Because of its small field-of-view instruments and telemetry restrictions, capturing major flares with good observing coverage needs challenging efforts on operation plannings for Hinode and we have been using the latest available AIA and HMI full-Sun images for targeting. Also, capturing the initial phase of large-scale emerging flux activities is not easy for Hinode without having the forecast of flux emergence before they are visible on the surface. Nevertheless, Hinode has some good examples of observations of such events. In this paper, we briefly discuss two specific observations; X-class flares in March 2012 and a large-scale flux emergence in December 2009. The Stokes polarimetry data for the flares presented in this paper reveals significant gas flows along the neutral line of the sheared magnetic distributions and the change of magnetic field inclination at the areas where penumbral development and disappearance was observed with the occurrence of the flares. The flux emergence and the sunspot formation presented were well monitored by the Hinode three telescopes from the beginning through the end of the emergence, Of particular interest is the finding of a precursory signature in the chromosphere preceding the appearance of sunspot penumbra.