FORCED FIELD EXTRAPOLATION OF THE MAGNETIC STRUCTURE OF THE Hα FIBRILS IN THE SOLAR CHROMOSPHERE

doi:10.3847/0004-637X/826/1/51

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	FORCED FIELD EXTRAPOLATION OF THE MAGNETIC STRUCTURE OF THE Hα FIBRILS IN THE SOLAR CHROMOSPHERE
	Zhu,Xiaoshuai; Wang,Huaning; Du,Zhanle; He,Han
刊名	The Astrophysical Journal
	2016-07-20
卷号	826 期号:1
关键词	magnetic fields magnetohydrodynamics (MHD) methods: numerical Sun: chromosphere
ISSN号	0004-637X
DOI	10.3847/0004-637X/826/1/51
英文摘要	ABSTRACT We present a careful assessment of forced field extrapolation using the Solar Dynamics Observatory/Helioseismic and Magnetic Imager magnetogram. We use several metrics to check the convergence property. The extrapolated field lines below 3600 km appear to be aligned with most of the Hα fibrils observed by the New Vacuum Solar Telescope. In the region where magnetic energy is far larger than potential energy, the field lines computed by forced field extrapolation are still consistent with the patterns of Hα fibrils while the nonlinear force-free field results show a large misalignment. The horizontal average of the lorentz force ratio shows that the forced region where the force-free assumption fails can reach heights of 1400–1800 km. The non-force-free state of the chromosphere is also confirmed based on recent radiation magnetohydrodynamics simulations.
语种	英语
出版者	The American Astronomical Society
WOS记录号	IOP:0004-637X-826-1-51
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/36072]
专题	中国科学院国家天文台
作者单位	Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China; xszhu@bao.ac.cn
推荐引用方式 GB/T 7714	Zhu,Xiaoshuai,Wang,Huaning,Du,Zhanle,et al. FORCED FIELD EXTRAPOLATION OF THE MAGNETIC STRUCTURE OF THE Hα FIBRILS IN THE SOLAR CHROMOSPHERE[J]. The Astrophysical Journal,2016,826(1).
APA	Zhu,Xiaoshuai,Wang,Huaning,Du,Zhanle,&He,Han.(2016).FORCED FIELD EXTRAPOLATION OF THE MAGNETIC STRUCTURE OF THE Hα FIBRILS IN THE SOLAR CHROMOSPHERE.The Astrophysical Journal,826(1).
MLA	Zhu,Xiaoshuai,et al."FORCED FIELD EXTRAPOLATION OF THE MAGNETIC STRUCTURE OF THE Hα FIBRILS IN THE SOLAR CHROMOSPHERE".The Astrophysical Journal 826.1(2016).