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A dynamo model for axisymmetric and non-axisymmetric solar magnetic fields
Jiang, J.; Wang, J. X.
2007-05-11
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume377Issue:2Pages:711-718
AbstractMore and more observations are showing a relatively weak, but persistent, non-axisymmetric magnetic field co-existing with the dominant axisymmetric field on the Sun. Its existence indicates that the non-axisymmetric magnetic field plays an important role in the origin of solar activity. A linear non-axisymmetric alpha(2)- Omega dynamo model is derived to explore the characteristics of the axisymmetric (m = 0) and the first non-axisymmetric (m = 1) modes and to provide a theoretical basis with which to explain the 'active longitude', 'flip-flop' and other non-axisymmetric phenomena. The model consists of an updated solar internal differential rotation, a turbulent diffusivity varying with depth, and an alpha-effect working at the tachocline in a rotating spherical system. The difference between the alpha(2)-Omega and the alpha-Omega models and the conditions that favour the non-axisymmetric modes under solar-like parameters are also presented.
KeywordMagnetic Fields Mhd Sun : Activity Sun : Magnetic Fields
DOI10.1111/j.1365-2966.2007.11644.x
Indexed BySCI
Language英语
WOS IDWOS:000246032400022
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/8315
Collection太阳物理研究部
AffiliationChinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
Recommended Citation
GB/T 7714
Jiang, J.,Wang, J. X.. A dynamo model for axisymmetric and non-axisymmetric solar magnetic fields[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2007,377(2):711-718.
APA Jiang, J.,&Wang, J. X..(2007).A dynamo model for axisymmetric and non-axisymmetric solar magnetic fields.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,377(2),711-718.
MLA Jiang, J.,et al."A dynamo model for axisymmetric and non-axisymmetric solar magnetic fields".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 377.2(2007):711-718.
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