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CURRENT-DRIVEN KINK INSTABILITY IN RELATIVISTIC JETS

被引：0
|
作者：
Mizuno, Yosuke [1 ]
Hardee, Philip E. [2 ]
Lyubarsky, Yuri [3 ]
Nishikawa, Ken-Ichi [4 ]
机构：
[1] Univ Alabama, Ctr Space Plasma & Aeron Res, Huntsville, AL 35805 USA
[2] Univ Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487 USA
[3] Ben Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, Israel
[4] Univ Alabama, CSPAR, Huntsville, AL 35805 USA
来源：
INTERNATIONAL JOURNAL OF MODERN PHYSICS D | 2010年 / 19卷 / 06期
基金：
美国国家科学基金会;
关键词：
Relativistic jets; instabilities; magnetohydrodynamics; MAGNETOHYDRODYNAMIC SIMULATIONS; STABILITY; FIELD;
D O I：
10.1142/S0218271810016713
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We have investigated the development of current-driven (CD) kink instability in relativistic jets via 3D RMHD simulations. In this investigation a static force-free equilibrium helical magnetic configuration is considered in order to study the influence of the initial configuration on the linear and nonlinear evolution of the instability. We found that the initial configuration is strongly distorted but not disrupted by the CD kink instability. The linear growth and nonlinear evolution of the CD kink instability depend moderately on the radial density profile and strongly on the magnetic pitch profile. Kink amplitude growth in the nonlinear regime for decreasing magnetic pitch leads to a slender helically twisted column wrapped by magnetic field. On the other hand, kink amplitude growth in the nonlinear regime nearly ceases for increasing magnetic pitch.
引用
收藏
页码：683 / 688
页数：6
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