Coronal loop oscillations - Calculation of resonantly damped MHD quasi-mode kink oscillations of longitudinally stratified loops

被引:151
作者
Andries, J
Goossens, M
Hollweg, JV
Arregui, I
Van Doorsselaere, T
机构
[1] Katholieke Univ Leuven, Ctr Plasma Astrophys, B-3001 Louvain, Belgium
[2] Univ New Hampshire, Ctr Space Sci, Durham, NH 03824 USA
[3] Univ New Hampshire, Inst Study Earth Oceans & Space, Durham, NH 03824 USA
关键词
Sun : corona; Sun : magnetic fields; Sun : oscillations;
D O I
10.1051/0004-6361:20041832
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The observed coronal loop oscillations and their damping are often theoretically described by the use of a very simple coronal loop model, viz. a straight, longitudinally invariant, axi-symmetric, and pressureless flux tube with a different density inside and outside of the loop. In this paper we generalize the model by including longitudinal density stratification and we examine how the longitudinal density stratification alters the linear eigenmodes of the system, their oscillation frequencies, and the damping rates by resonant absorption.
引用
收藏
页码:1109 / +
页数:13
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