TURBULENT CROSS-HELICITY IN THE MEAN-FIELD SOLAR DYNAMO PROBLEM
文献类型：期刊论文
| 作者 | Pipin, V. V.1,2,3,4; Kuzanyan, K. M.1,5; Zhang, H.1; Kosovichev, A. G.4 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2011-12-20 |
| 卷号 | 743期号:2 |
| 关键词 | Sun: dynamo Sun: interior Sun: magnetic topology turbulence |
| 英文摘要 | We study the dynamical and statistical properties of turbulent cross-helicity (correlation of the aligned fluctuating velocity and magnetic field components). We derive an equation governing generation and evolution of the turbulent cross-helicity and discuss its meaning for the dynamo. Using the symmetry properties of the problem we suggest a general expression for the turbulent cross-helicity. Effects of the density stratification, large-scale magnetic fields, differential rotation, and turbulent convection are taken into account. We investigate the relative contribution of these effects to the cross-helicity evolution for two kinds of dynamo models of the solar cycle: a distributed mean-field model and a flux-transport dynamo model. We show that the contribution from the density stratification follows the evolution of the radial magnetic field, while large-scale electric currents produce a more complicated pattern of the cross-helicity of comparable magnitude. The pattern of the cross-helicity evolution strongly depends on details of the dynamo mechanism. Thus, we anticipate that direct observations of the cross-helicity on the Sun may serve for the diagnostic purpose of the solar dynamo process. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000298178400062 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/7906]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 2.Russian Acad Sci, Inst Solar Terr Phys, Irkutsk 664033, Russia 3.Univ Calif Los Angeles, Inst Geophys & Planetary Phys, Los Angeles, CA 90065 USA 4.Stanford Univ, Hansen Expt Phys Lab, Stanford, CA 94305 USA 5.Russian Acad Sci, Inst Solar Terr Magnetism & Ionosphere & Radiowav, Troitsk 142092, Moscow Region, Russia |
| 推荐引用方式 GB/T 7714 | Pipin, V. V.,Kuzanyan, K. M.,Zhang, H.,et al. TURBULENT CROSS-HELICITY IN THE MEAN-FIELD SOLAR DYNAMO PROBLEM[J]. ASTROPHYSICAL JOURNAL,2011,743(2). |
| APA | Pipin, V. V.,Kuzanyan, K. M.,Zhang, H.,&Kosovichev, A. G..(2011).TURBULENT CROSS-HELICITY IN THE MEAN-FIELD SOLAR DYNAMO PROBLEM.ASTROPHYSICAL JOURNAL,743(2). |
| MLA | Pipin, V. V.,et al."TURBULENT CROSS-HELICITY IN THE MEAN-FIELD SOLAR DYNAMO PROBLEM".ASTROPHYSICAL JOURNAL 743.2(2011). |
入库方式： OAI收割
来源：国家天文台
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