A Non-axisymmetric Spherical α2-Dynamo
Jie Jiang; Jingxiu Wang
Source Publication中国天文和天体物理学报:英文版
AbstractUsing the Chebyshev-tau method, the generation of oscillatory nonaxisymmetric stellar magnetic fields by the α^2-dynamo is studied in spherical geometry. Following the boundary conditions given by Schubert & Zhang, the spherical α^2-dynamo consists of a fully convective spherical shell with inner radius ri and outer radius ro. A comparison of the critical dynamo numbers of axisymmetric and φ-dependent modes for different thicknesses of the convective shell and different α- profiles leads to the following qualitative results: (i) when the angular factor of α- profile is sin^n θ cosθ (n= 1, 2, 4) the solutions of the α^2dynamo are oscillatory and non-axisymmetric, (ii) the thinner the convective shell, the more easily is the nonaxisymmetric mode excited and the higher is the latitudinal wave number, (iii) the thickness of the outer convective shell has an effect on the symmetries of the magnetic fields.
Keyword非对称球形 磁性 数值模拟 星系
Document Type期刊论文
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Jie Jiang,Jingxiu Wang. A Non-axisymmetric Spherical α2-Dynamo[J]. 中国天文和天体物理学报:英文版,2006,6.0(002):227.
APA Jie Jiang,&Jingxiu Wang.(2006).A Non-axisymmetric Spherical α2-Dynamo.中国天文和天体物理学报:英文版,6.0(002),227.
MLA Jie Jiang,et al."A Non-axisymmetric Spherical α2-Dynamo".中国天文和天体物理学报:英文版 6.0.002(2006):227.
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