中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
NONLINEAR FORCE-FREE FIELD EXTRAPOLATION OF A CORONAL MAGNETIC FLUX ROPE SUPPORTING A LARGE-SCALE SOLAR FILAMENT FROM A PHOTOSPHERIC VECTOR MAGNETOGRAM

文献类型:期刊论文

作者Jiang, Chaowei; Wu, S. T.; Feng, Xueshang; Hu, Qiang
刊名ASTROPHYSICAL JOURNAL LETTERS
出版日期2014
卷号786期号:2页码:L16
ISSN号2041-8205
关键词magnetic fields magnetohydrodynamics ( MHD) methods: numerical Sun: corona Sun: filaments prominences
通讯作者Jiang, CW (reprint author), Univ Alabama, Ctr Space Plasma & Aeron Res, Huntsville, AL 35899 USA.
英文摘要Solar filaments are commonly thought to be supported inmagnetic dips, in particular, in those ofmagnetic flux ropes (FRs). In this Letter, based on the observed photospheric vector magnetogram, we implement a nonlinear force-free field (NLFFF) extrapolation of a coronal magnetic FR that supports a large-scale intermediate filament between an active region and a weak polarity region. This result is a first, in the sense that current NLFFF extrapolations including the presence of FRs are limited to relatively small-scale filaments that are close to sunspots and along main polarity inversion lines (PILs) with strong transverse field and magnetic shear, and the existence of an FR is usually predictable. In contrast, the present filament lies along the weak-field region (photospheric field strength less than or similar to 100 G), where the PIL is very fragmented due to small parasitic polarities on both sides of the PIL and the transverse field has a low signal-to-noise ratio. Thus, extrapolating a large-scale FR in such a case represents a far more difficult challenge. We demonstrate that our CESE-MHD-NLFFF code is sufficient for the challenge. The numerically reproduced magnetic dips of the extrapolated FR match observations of the filament and its barbs very well, which strongly supports the FR-dip model for filaments. The filament is stably sustained because the FR is weakly twisted and strongly confined by the overlying closed arcades.
学科主题空间物理
收录类别SCI
语种英语
源URL[http://ir.nssc.ac.cn/handle/122/2754]  
专题国家空间科学中心_空间科学部
推荐引用方式
GB/T 7714
Jiang, Chaowei,Wu, S. T.,Feng, Xueshang,et al. NONLINEAR FORCE-FREE FIELD EXTRAPOLATION OF A CORONAL MAGNETIC FLUX ROPE SUPPORTING A LARGE-SCALE SOLAR FILAMENT FROM A PHOTOSPHERIC VECTOR MAGNETOGRAM[J]. ASTROPHYSICAL JOURNAL LETTERS,2014,786(2):L16.
APA Jiang, Chaowei,Wu, S. T.,Feng, Xueshang,&Hu, Qiang.(2014).NONLINEAR FORCE-FREE FIELD EXTRAPOLATION OF A CORONAL MAGNETIC FLUX ROPE SUPPORTING A LARGE-SCALE SOLAR FILAMENT FROM A PHOTOSPHERIC VECTOR MAGNETOGRAM.ASTROPHYSICAL JOURNAL LETTERS,786(2),L16.
MLA Jiang, Chaowei,et al."NONLINEAR FORCE-FREE FIELD EXTRAPOLATION OF A CORONAL MAGNETIC FLUX ROPE SUPPORTING A LARGE-SCALE SOLAR FILAMENT FROM A PHOTOSPHERIC VECTOR MAGNETOGRAM".ASTROPHYSICAL JOURNAL LETTERS 786.2(2014):L16.

入库方式: OAI收割

来源:国家空间科学中心

浏览0
下载0
收藏0
其他版本

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。