YNAO OpenIR  > 太阳物理研究组
The effect of curvature on flux-rope models of coronal mass ejections
Lin J(林隽)1,2; Forbes, TG2; Isenberg, PA2; Demoulin, P3; Lin, J
Contribution Rank第1完成单位
Indexed BySCI
KeywordMhd Sun : Corona Sun : Flares Sun : Particle Emission
AbstractThe large-scale curvature of a flux rope can help propel it outward from the Sun. Here we extend previous two-dimensional flux-rope models of coronal mass ejections to include the curvature force. To obtain analytical results, we assume axial symmetry and model the flux rope as a torus that encircles the Sun. Initially, the flux rope is suspended in the corona by a balance between magnetic tension, compression, and curvature forces, but this balance is lost if the photospheric sources of the coronal field slowly decay with time. The evolution of the system shows catastrophic behavior as occurred in previous models, but, unlike the previous models, flux ropes with large radii are more likely to erupt than ones with small radii. The maximum total magnetic energy that can be stored before equilibrium is lost is 1.53 times the energy of the potential field, and this value is less than the limiting value of 1.662 for the fully opened field. As a consequence, the loss of ideal MHD equilibrium that occurs in the model cannot completely open the magnetic field. However, the loss of equilibrium does lead to the sudden formation of a current sheet, and if rapid reconnection occurs in this sheet, then the flux rope can escape from the Sun. We also find that the held can gradually become opened without suffering any loss of equilibrium if the photospheric field strength falls below a critical value. This behavior is analogous to the opening of a spherically symmetric arcade in response to a finite amount of shear.
Subject AreaAstronomy & Astrophysics
WOS IDWOS:000077777500037
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
Citation statistics
Cited Times:152[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorLin, J
Affiliation1.Yunnan Observatory, P.O. Box 110, Kunming, YN 650011, China
2.Institute for the Study of Earth, Ocean, and Space (EOS), University of New Hampshire, Durham, NH 03824
3.Département d'Astronomie Solaire et Planétaire, Observatoire de Paris, Section de Meudon, 92195 Meudon Principal Cédex, France
Recommended Citation
GB/T 7714
Lin J,Forbes, TG,Isenberg, PA,et al. The effect of curvature on flux-rope models of coronal mass ejections[J]. ASTROPHYSICAL JOURNAL,1998,504(2):1006-1019.
APA Lin J,Forbes, TG,Isenberg, PA,Demoulin, P,&Lin, J.(1998).The effect of curvature on flux-rope models of coronal mass ejections.ASTROPHYSICAL JOURNAL,504(2),1006-1019.
MLA Lin J,et al."The effect of curvature on flux-rope models of coronal mass ejections".ASTROPHYSICAL JOURNAL 504.2(1998):1006-1019.
Files in This Item:
File Name/Size DocType Version Access License
The Effect of Curvat(399KB)期刊论文作者接受稿开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Lin J(林隽)]'s Articles
[Forbes, TG]'s Articles
[Isenberg, PA]'s Articles
Baidu academic
Similar articles in Baidu academic
[Lin J(林隽)]'s Articles
[Forbes, TG]'s Articles
[Isenberg, PA]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Lin J(林隽)]'s Articles
[Forbes, TG]'s Articles
[Isenberg, PA]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: The Effect of Curvature on Flux-Rope Models of Coronal Mass Ejections.pdf
Format: Adobe PDF
All comments (0)
No comment.

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.