HELICITY CONSERVATION IN NONLINEAR MEAN-FIELD SOLAR DYNAMO
文献类型：期刊论文
| 作者 | Pipin, V. V.1,3; Zhang, H.3; Sokoloff, D. D.3,4; Kuzanyan, K. M.2,3 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2013-05-01 |
| 卷号 | 768期号:1 |
| 关键词 | Sun: Dynamo Sun: Interior Sun: Magnetic Topology Turbulence |
| DOI | 10.1088/0004-637X/768/1/46 |
| 英文摘要 | It is believed that magnetic helicity conservation is an important constraint on large-scale astrophysical dynamos. In this paper, we study a mean-field solar dynamo model that employs two different formulations of the magnetic helicity conservation. In the first approach, the evolution of the averaged small-scale magnetic helicity is largely determined by the local induction effects due to the large-scale magnetic field, turbulent motions, and the turbulent diffusive loss of helicity. In this case, the dynamo model shows that the typical strength of the large-scale magnetic field generated by the dynamo is much smaller than the equipartition value for the magnetic Reynolds number 10(6). This is the so-called catastrophic quenching (CQ) phenomenon. In the literature, this is considered to be typical for various kinds of solar dynamo models, including the distributed-type and the Babcock-Leighton-type dynamos. The problem can be resolved by the second formulation, which is derived from the integral conservation of the total magnetic helicity. In this case, the dynamo model shows that magnetic helicity propagates with the dynamo wave from the bottom of the convection zone to the surface. This prevents CQ because of the local balance between the large-scale and small-scale magnetic helicities. Thus, the solar dynamo can operate in a wide range of magnetic Reynolds numbers up to 10(6). |
| 语种 | 英语 |
| WOS记录号 | WOS:000317960500046 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/8892]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Russian Acad Sci, Inst Solar Terr Phys, Irkutsk 664033, Russia 2.Russian Acad Sci, IZMIRAN, Moscow 142190, Russia 3.Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing 100012, Peoples R China 4.Moscow MV Lomonosov State Univ, Dept Phys, Moscow 119992, Russia |
| 推荐引用方式 GB/T 7714 | Pipin, V. V.,Zhang, H.,Sokoloff, D. D.,et al. HELICITY CONSERVATION IN NONLINEAR MEAN-FIELD SOLAR DYNAMO[J]. ASTROPHYSICAL JOURNAL,2013,768(1). |
| APA | Pipin, V. V.,Zhang, H.,Sokoloff, D. D.,&Kuzanyan, K. M..(2013).HELICITY CONSERVATION IN NONLINEAR MEAN-FIELD SOLAR DYNAMO.ASTROPHYSICAL JOURNAL,768(1). |
| MLA | Pipin, V. V.,et al."HELICITY CONSERVATION IN NONLINEAR MEAN-FIELD SOLAR DYNAMO".ASTROPHYSICAL JOURNAL 768.1(2013). |
入库方式： OAI收割
来源：国家天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。