OCCURRENCE RATES AND HEATING EFFECTS OF TANGENTIAL AND ROTATIONAL DISCONTINUITIES AS OBTAINED FROM THREE-DIMENSIONAL SIMULATION OF MAGNETOHYDRODYNAMIC TURBULENCE
文献类型：期刊论文
| 作者 | Zhang, Lei; He, Jiansen; Tu, Chuanyi; Yang, Liping; Wang, Xin; Marsch, Eckart; Wang, Linghua |
| 刊名 | ASTROPHYSICAL JOURNAL LETTERS
 |
| 出版日期 | 2015 |
| 卷号 | 804期号:2页码:L43 |
| 关键词 | magnetohydrodynamics (MHD) methods: numerical solar wind |
| ISSN号 | 2041-8205 |
| 通讯作者 | Zhang, L (reprint author), Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China. |
| 英文摘要 | MHD discontinuities are ubiquitous in the solar wind and are often found at the origin of turbulence intermittency. They may also play a key role in the turbulence dissipation and heating of the solar wind. The tangential discontinuities (TDs) and rotational discontinuities (RDs) are the two most important types of discontinuities. Recently, the connection between turbulence intermittency and proton thermodynamics has been observationally investigated. Here, we present numerical results from a three-dimensional MHD simulation with pressure anisotropy and we define new methods for identifying and distinguishing TDs and RDs. Three statistical results obtained for the relative occurrence rates and heating effects are highlighted: (1) RDs tend to take up the majority of the discontinuities along with time; (2) the thermal states embedding TDs tend to be associated with extreme plasma parameters or instabilities while RDs do not; (3) TDs have a higher average T as well as perpendicular temperature T.. The simulation shows that TDs and RDs evolve and contribute to solar wind heating differently. These results will improve our understanding of the mechanisms that generate discontinuities and cause plasma heating. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 源URL | [http://ir.nssc.ac.cn/handle/122/4665]  |
| 专题 | 国家空间科学中心_空间科学部 |
| 推荐引用方式 GB/T 7714 | Zhang, Lei,He, Jiansen,Tu, Chuanyi,et al. OCCURRENCE RATES AND HEATING EFFECTS OF TANGENTIAL AND ROTATIONAL DISCONTINUITIES AS OBTAINED FROM THREE-DIMENSIONAL SIMULATION OF MAGNETOHYDRODYNAMIC TURBULENCE[J]. ASTROPHYSICAL JOURNAL LETTERS,2015,804(2):L43. |
| APA | Zhang, Lei.,He, Jiansen.,Tu, Chuanyi.,Yang, Liping.,Wang, Xin.,...&Wang, Linghua.(2015).OCCURRENCE RATES AND HEATING EFFECTS OF TANGENTIAL AND ROTATIONAL DISCONTINUITIES AS OBTAINED FROM THREE-DIMENSIONAL SIMULATION OF MAGNETOHYDRODYNAMIC TURBULENCE.ASTROPHYSICAL JOURNAL LETTERS,804(2),L43. |
| MLA | Zhang, Lei,et al."OCCURRENCE RATES AND HEATING EFFECTS OF TANGENTIAL AND ROTATIONAL DISCONTINUITIES AS OBTAINED FROM THREE-DIMENSIONAL SIMULATION OF MAGNETOHYDRODYNAMIC TURBULENCE".ASTROPHYSICAL JOURNAL LETTERS 804.2(2015):L43. |
入库方式： OAI收割
来源：国家空间科学中心
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