Chromospheric Cannonballs on the Sun

doi:10.3847/2041-8213/ab2fe2

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	Chromospheric Cannonballs on the Sun
	Yang,Shuhong 1,2; Zhang,Jun 1,2; Li,Xiaohong 1,2; Liu,Zhong 3; Xiang,Yongyuan 3
刊名	The Astrophysical Journal Letters
	2019-07-30
卷号	880 期号:2
关键词	magnetic reconnection Sun: activity Sun: chromosphere Sun: magnetic fields
ISSN号	2041-8205
DOI	10.3847/2041-8213/ab2fe2
英文摘要	Abstract In the highly dynamic chromosphere, there exist many kinds of small-scale activities, such as spicules, surges, and Ellerman bombs. Here, we report the discovery of a new phenomenon in the chromosphere observed with the New Vacuum Solar Telescope at the Fuxian Solar Observatory. In the high tempo-spatial-resolution Hα images, some dark or bright structures are found to fly along the curved trajectory, looking like cannonballs. Their average size, mass, and velocity are about 1.5?×?109 km3, 1.5?×?108 kg, and 56 km s?1, respectively. In the simultaneous (extreme-)ultraviolet images obtained by the Solar Dynamics Observatory, these cannonballs appear as brighter features compared to the surrounding area, implying that there exists some kind of heating during this process. The photospheric magnetograms show the magnetic flux emergence and interaction with the pre-existing fields. These observations reveal that the cannonballs are chromospheric material blobs launched due to the magnetic reconnection between emerging magnetic flux and the pre-existing loops.
语种	英语
出版者	The American Astronomical Society
WOS记录号	IOP:2041-8205-880-2-AB2FE2
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/27136]
专题	中国科学院国家天文台
作者单位	1.CAS Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China shuhongyang@nao.cas.cn, zjun@nao.cas.cn 2.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China 3.Fuxian Solar Observatory, Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, People’s Republic of China
推荐引用方式 GB/T 7714	Yang,Shuhong,Zhang,Jun,Li,Xiaohong,et al. Chromospheric Cannonballs on the Sun[J]. The Astrophysical Journal Letters,2019,880(2).
APA	Yang,Shuhong,Zhang,Jun,Li,Xiaohong,Liu,Zhong,&Xiang,Yongyuan.(2019).Chromospheric Cannonballs on the Sun.The Astrophysical Journal Letters,880(2).
MLA	Yang,Shuhong,et al."Chromospheric Cannonballs on the Sun".The Astrophysical Journal Letters 880.2(2019).