YNAO OpenIR  > 太阳物理研究组
Alternative TitleNumerical Experiments Based on the Catastrophe Model of Solar Eruptions
谢小妍1,2,3; ZIEGLER Udo4; 梅志星1,2,5; 吴宁6; 林隽1,2
Source Publication天文学报(Acta Astronomica Sinica)
Contribution Rank第1完成单位
Indexed ByCSCD ; 核心
Keyword太阳:日冕物质抛射 太阳:磁场 磁流体动力学 方法:数值


Other Abstract

On the basis of the catastrophe model developed by Isenberg et al., we use the NIRVANA code to perform the magnetohydrodynamics (MHD) numerical experiments to look into various behaviors of the coronal magnetic configuration that includes a current-carrying flux rope used to model the prominence levitating in the corona. These behaviors include the evolution in equilibrium heights of the flux rope versus the change in the background magnetic field, the corresponding internal equilibrium of the flux rope, dynamic properties of the flux rope after the system loses equilibrium, as well as the impact of the referential radius on the equilibrium heights of the flux rope. In our calculations, an empirical model of the coronal density distribution given by Sittler & Guhathakurta is used, and the physical diffusion is included. Our experiments show that the deviation of simulations in the equilibrium heights from the theoretical results exists, but is not apparent, and the evolutionary features of the two results are similar. If the flux rope is initially locate at the stable branch of the theoretical equilibrium curve, the flux rope will quickly reach the equilibrium position in the simulation after several rounds of oscillations as a result of the self-adjustment of the system; and the flux rope lose the equilibrium if the initial location of the flux rope is set at the critical point on the theoretical equilibrium curve. Correspondingly, the internal equilibrium of the flux rope can be reached as well, and the deviation from the theoretical results is somewhat apparent since the approximation of the small radius of the flux rope is lifted in our experiments, but such deviation does not affect the global equilibrium in the system. The impact of the referential radius on the equilibrium heights of the flux rope is consistent with the prediction of the theory. Our calculations indicate that the motion of the flux rope after the loss of equilibrium is consistent with which is predicted by the Lin-Forbes model and observations. Formation of the fast mode shock ahead of the flux rope is observed in our experiments. Outward motions of the flux rope are smooth, and magnetic energy is continuously converted into the other types of energy because both the diffusions are considered in calculations, and magnetic reconnection is allowed to occur successively in the current sheet behind the flux rope.

Funding Project国家自然科学基金项目[11333007] ; 国家自然科学基金项目[U1631130] ; 973项目[2013CBA01503] ; 中国科学院前沿重点研究项目[QYZDJ-SSW-SLH012] ; NSFC-广东联合基金(第二期)超级计算科学应用研究专项[U1501501]
Funding Organization国家自然科学基金项目[11333007, U1631130] ; 973项目[2013CBA01503] ; 中国科学院前沿重点研究项目[QYZDJ-SSW-SLH012] ; NSFC-广东联合基金(第二期)超级计算科学应用研究专项[U1501501]
Subject Area太阳与太阳系
MOST Discipline Catalogue理学 ; 理学::天文学
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Document Type期刊论文
Affiliation1.中国科学院云南天文台, 昆明, 650011
2.中国科学院天文大科学研究中心, 北京, 100012
3.中国科学院大学, 北京, 100049
4.Leibniz Institute for Astrophysics Potsdam, Potsdam, 14482
5.Centre for Mathematical Plasma Astrophysics, Department of Mathematics, Katholieke Universiteit Leuven, Leuven, 3001
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
谢小妍,ZIEGLER Udo,梅志星,等. 基于太阳爆发灾变模型的数值实验[J]. 天文学报(Acta Astronomica Sinica),2017,56(6):39-58.
APA 谢小妍,ZIEGLER Udo,梅志星,吴宁,&林隽.(2017).基于太阳爆发灾变模型的数值实验.天文学报(Acta Astronomica Sinica),56(6),39-58.
MLA 谢小妍,et al."基于太阳爆发灾变模型的数值实验".天文学报(Acta Astronomica Sinica) 56.6(2017):39-58.
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