气候变化领域集成服务门户(CCPortal): Decay of the coronal magnetic field can release sufficient energy to power a solar flare

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DOI	10.1126/science.aax6874
	Decay of the coronal magnetic field can release sufficient energy to power a solar flare
	Fleishman G.D.; Gary D.E.; Chen B.; Kuroda N.; Yu S.; Nita G.M.
发表日期	2020
ISSN	0036-8075
起始页码	278
结束页码	280
卷号	367 期号:6475
英文摘要	Solar flares are powered by a rapid release of energy in the solar corona, thought to be produced by the decay of the coronal magnetic field strength. Direct quantitative measurements of the evolving magnetic field strength are required to test this. We report microwave observations of a solar flare, showing spatial and temporal changes in the coronal magnetic field. The field decays at a rate of ~5 Gauss per second for 2 minutes, as measured within a flare subvolume of ~1028 cubic centimeters. This fast rate of decay implies a sufficiently strong electric field to account for the particle acceleration that produces the microwave emission. The decrease in stored magnetic energy is enough to power the solar flare, including the associated eruption, particle acceleration, and plasma heating. © 2020 American Association for the Advancement of Science. All rights reserved.
关键词	electric field heating magnetic field microwave radiation temporal variation acceleration article electric field heating human tissue magnetic field microwave radiation quantitative analysis
语种	英语
来源机构	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/133783
推荐引用方式 GB/T 7714	Fleishman G.D.,Gary D.E.,Chen B.,et al. Decay of the coronal magnetic field can release sufficient energy to power a solar flare[J]. Science,2020,367(6475).
APA	Fleishman G.D.,Gary D.E.,Chen B.,Kuroda N.,Yu S.,&Nita G.M..(2020).Decay of the coronal magnetic field can release sufficient energy to power a solar flare.,367(6475).
MLA	Fleishman G.D.,et al."Decay of the coronal magnetic field can release sufficient energy to power a solar flare".367.6475(2020).