Current-sheet buildup and magnetic reconnection in weakly ionized solar lower atmosphere

CORC > 紫金山天文台 > 中国科学院紫金山天文台 > 太阳活动的多波段观测研究团组

	Current-sheet buildup and magnetic reconnection in weakly ionized solar lower atmosphere
	Ji, HS; Song, MT ; Li, XQ
刊名	SOLAR PHYSICS
	2001
卷号	198 期号:1 页码:133-148
关键词	AMBIPOLAR DIFFUSION INTERSTELLAR-MEDIUM ACTIVE REGION QUIET SUN CANCELLATION FLUX FLARES
ISSN号	0038-0938
英文摘要	Solar observations show that magnetic reconnection can occur in the Sun's weakly ionized lower atmosphere (magnetic cancellation, Ellerman bombs and type II white-light flares). Unlike what the usual reconnection models have predicted, such a reconnection is accompanied by temperature enhancements which are less than 10%. To overcome this difficulty, we have reexamined the reconnection in a two-fluid model using a 2D numerical simulation. The numerical solutions demonstrate the following results: (1) Under the influence of Lorentz force, ionized gas carries the magnetic field into a diffusion region where part of the field is annihilated, and the current-sheet scaling laws for the weakly ionized plasma are basically the same as in the fully ionized case. (2) Though the neutral gas is not directly affected by the magnetic field due to frictional forces, its motion is almost the same as the ionized gas except in the region near stagnation point where the streamlines of both species differ appreciably. (3) The pressure of neutrals which governs the distribution of total pressure and temperature varies slightly. So the temperature of the whole domain is nearly uniform in space and constant in time. These results support the idea that magnetic cancellation, Ellerman bombs, and type II white-light flares are due to magnetic reconnection in the Sun's lower atmosphere.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	AMBIPOLAR DIFFUSION ; INTERSTELLAR-MEDIUM ; ACTIVE REGION ; QUIET SUN ; CANCELLATION ; FLUX ; FLARES
收录类别	SCI
语种	英语
WOS记录号	WOS:000166870200007
公开日期	2013-01-31
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/8219]
专题	紫金山天文台_太阳活动的多波段观测研究团组
作者单位	1.Purple Mt Observ, Nanjing 210008, Peoples R China 2.Natl Astron Observ, Beijing 100080, Peoples R China 3.Nanjing Normal Univ, Dept Phys, Nanjing 210087, Peoples R China
推荐引用方式 GB/T 7714	Ji, HS,Song, MT,Li, XQ. Current-sheet buildup and magnetic reconnection in weakly ionized solar lower atmosphere[J]. SOLAR PHYSICS,2001,198(1):133-148.
APA	Ji, HS,Song, MT,&Li, XQ.(2001).Current-sheet buildup and magnetic reconnection in weakly ionized solar lower atmosphere.SOLAR PHYSICS,198(1),133-148.
MLA	Ji, HS,et al."Current-sheet buildup and magnetic reconnection in weakly ionized solar lower atmosphere".SOLAR PHYSICS 198.1(2001):133-148.