H-α和C IV中的动态原纤维
Dynamic fibrils in H-alpha and C IV
摘要：
目的：研究太阳色球层与过渡区的相互作用，特别是过渡区的活动区喷流及其与色球层纤维的关系。研究方法：我们仔细地调整图像序列同时在C IV与过渡区和日冕探测器和H-α与瑞典1米太阳望远镜。我们研究了“动态原纤维”的时间演变，即，在H-α中的个别短寿命活动区色球喷流状特征。结果如下：所有的动态原纤维都表现为H-α的吸收特征，从蓝色翼到红色翼通过该线，并且经常表现出复发行为。它们中的一些，但不是全部，在C IV中也表现为明亮的特征，这些特征在H-α变暗的顶点处或刚刚超过顶点。它们往往最像半分钟前+700 mA时的H-α原纤维。结论：在H-α中观察到的动态色球原纤维与在紫外线中观察到的过渡区喷流有规律地对应。这种对应关系表明，一些与动态原纤维相关的等离子体被加热到过渡区温度。
英文摘要：
Aim: To study the interaction of the solar chromosphere with the transition region, in particular active-region jets in the transition region and their relation to chromospheric fibrils. Methods: We carefully align image sequences taken simultaneously in C IV with the Transition Region and Coronal Explorer and in H-alpha with the Swedish 1-m Solar Telescope. We examine the temporal evolution of "dynamic fibrils", i.e., individual short-lived active-region chromospheric jet-like features in H-alpha. Results: All dynamic fibrils appear as absorption features in H-alpha that progress from the blue to the red wing through the line, and often show recurrent behavior. Some of them, but not all, appear also as bright features in C IV which develop at or just beyond the apex of the H-alpha darkening. They tend to best resemble the H-alpha fibril at +700 mA half a minute earlier. Conclusions: Dynamic chromospheric fibrils observed in H-alpha regularly correspond to transition-region jets observed in the ultraviolet. This correspondence suggests that some plasma associated with dynamic fibrils is heated to transition-region temperatures.
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