PROPAGATING DISTURBANCES IN THE SOLAR CORONA AND SPICULAR CONNECTION
PROPAGATING DISTURBANCES IN THE SOLAR CORONA AND SPICULAR CONNECTION
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DOI：
10.1088/2041-8205/815/1/l16
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发表时间：
2015-11
期刊：
影响因子：
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通讯作者：
T. Samanta;V. Pant;D. Banerjee
中科院分区：
文献类型：
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作者：
T. Samanta;V. Pant;D. Banerjee
针状体是在太阳边缘看到的小的，毛状的结构，主要在色球和过渡区线。它们通常存活3-10分钟。我们使用太阳动力学天文台上的界面区成像光谱仪（IRIS）和大气成像组件（AIA）仪器进行协调观测，研究太阳南极区域的这些针状体。在日冕高度的太阳极地边缘外区域，到处都可以观察到扰动（PD）。从这些同时观察，我们表明，骨针和PD可能起源于通过一个共同的过程。从时空图中，我们发现PD轨迹的开始几乎与2796年和1400年的IRIS狭缝颚图像所见的针状包络的上升时间同步。在针状物质返回的过程中，在AIA 171和193的图像中可以看到增亮。准周期性的针状活动，所揭示的IRIS光谱图像序列，其关系到冠状PD，记录的冠状AIA通道，表明它们有一个共同的起源。我们建议，重联过程产生的针状体和波同时进行。当冷的针状物质福尔斯落回时，波浪逃逸。
Spicules are small, hairy-like structures seen at the solar limb, mainly at chromospheric and transition region lines. They generally live for 3–10 minutes. We study these spicules in a south polar region of the Sun with coordinated observations using the Interface Region Imaging Spectrograph (IRIS) and the Atmospheric Imaging Assembly (AIA) instruments on board the Solar Dynamics Observatory. Propagating disturbances (PDs) are observed everywhere in the polar off-limb regions of the Sun at coronal heights. From these simultaneous observations, we show that the spicules and the PDs may have originated through a common process. From spacetime maps, we find that the start of the trajectory of PDs is almost cotemporal with the time of the rise of the spicular envelope as seen by IRIS slit-jaw images at 2796 and 1400 Å. During the return of spicular material, brightenings are seen in AIA 171 and 193 Å images. The quasi-periodic nature of the spicular activity, as revealed by the IRIS spectral image sequences, and its relation to coronal PDs, as recorded by the coronal AIA channels, suggest that they share a common origin. We propose that reconnection-like processes generate the spicules and waves simultaneously. The waves escape while the cool spicular material falls back.