| Multiscale Pressure-Balanced Structures in Three-dimensional Magnetohydrodynamic Turbulence | |
| Yang, Liping; He, Jiansen; Tu, Chuanyi; Li, Shengtai; Zhang, Lei; Marsch, Eckart; Wang, Linghua; Wang, Xin; Feng, Xueshang | |
| Department | 空间科学部 |
| Source Publication | ASTROPHYSICAL JOURNAL
 |
| 2017 | |
| Volume | 836Issue:1Pages:69 |
| ISSN | 0004-637X |
| Language | 英语 |
| Keyword | Solar Wind Turbulence Waves |
| Abstract | Observations of solar wind turbulence indicate the existence of multiscale pressure-balanced structures (PBSs) in the solar wind. In this work, we conduct a numerical simulation to investigate multiscale PBSs and in particular their formation in compressive magnetohydrodynamic turbulence. By the use of the higher-order Godunov code Athena, a driven compressible turbulence with an imposed uniform guide field is simulated. The simulation results show that both the magnetic pressure and the thermal pressure exhibit a turbulent spectrum with a Kolmogorovlike power law, and that in many regions of the simulation domain they are anticorrelated. The computed wavelet cross-coherence spectra of the magnetic pressure and the thermal pressure, as well as their space series, indicate the existence of multiscale PBSs, with the small PBSs being embedded in the large ones. These multiscale PBSs are likely to be related to the highly oblique-propagating slow-mode waves, as the traced multiscale PBS is found to be traveling in a certain direction at a speed consistent with that predicted theoretically for a slow-mode wave propagating in the same direction. |
| Indexed By | SCI |
| Document Type | 期刊论文 |
| Identifier | http://ir.nssc.ac.cn/handle/122/5816 |
| Collection | 空间科学部 |
| Recommended Citation GB/T 7714 | Yang, Liping,He, Jiansen,Tu, Chuanyi,et al. Multiscale Pressure-Balanced Structures in Three-dimensional Magnetohydrodynamic Turbulence[J]. ASTROPHYSICAL JOURNAL,2017,836(1):69. |
| APA | Yang, Liping.,He, Jiansen.,Tu, Chuanyi.,Li, Shengtai.,Zhang, Lei.,...&Feng, Xueshang.(2017).Multiscale Pressure-Balanced Structures in Three-dimensional Magnetohydrodynamic Turbulence.ASTROPHYSICAL JOURNAL,836(1),69. |
| MLA | Yang, Liping,et al."Multiscale Pressure-Balanced Structures in Three-dimensional Magnetohydrodynamic Turbulence".ASTROPHYSICAL JOURNAL 836.1(2017):69. |
| Files in This Item: | Download All | |||||
| File Name/Size | DocType | Version | Access | License | ||
| 2017836169.pdf（2168KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Download | |
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