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题名: The bi-directional moving structures in a coronal bright point
作者: Li, Dong; Ning, Zongjun; Su, Yingna
刊名: ASTROPHYSICS AND SPACE SCIENCE
出版日期: 2016
卷号: 361, 期号:9, 页码:301
DOI: 10.1007/s10509-016-2893-y
英文摘要: We report the bi-directional moving structures in a coronal bright point (CBP) on 2015 July 14. It is observed by the Atmospheric Imaging Assembly (AIA) onboard Solar Dynamics Observatory (SDO). This CBP has a lifetime of similar to 10 minutes, and a curved shape. The observations show that many bright structures are moving intermittently outward from the CBP brightness core. Such moving structures are clearly seen at AIA 171 angstrom, 193 angstrom, 211 angstrom, 131 angstrom, 94 angstrom, 335 angstrom and 304 angstrom, slit-jaw (SJI) 1330 angstrom and 1400 angstrom. In order to analyze these moving structures, the CBP is cut along the moving direction with a curved slit from the AIA and SJI images. Then we can obtain the time-distance slices, including the intensity and intensity-derivative diagrams, from which, the moving structures are recognized as the oblique streaks, and they are characterized by the bi-direction, simultaneity, symmetry, and periodicity. The average speed is around 300 kms(-1), while the typically period is similar to 90 s. All these features (including the bi-directional flows and their periodicity) can be detected simultaneously at all the 9 wavelengths. This CBP takes place at the site between a small pair of magnetic polarities. High time resolution observations show that they are moving close to each other during its lifetime. These facts support the magnetic reconnection model of the CBP and the bi-directional moving structures could be the observational outflows after the reconnection. Therefore, they can be as the direct observation evidence of the magnetic reconnection.
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内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/16870
Appears in Collections:太阳高能及相关物理过程研究团组_期刊论文

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