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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 PublicationASTROPHYSICAL JOURNAL
2017
Volume836Issue:1Pages:69
ISSN0004-637X
Language英语
KeywordSolar Wind Turbulence Waves
AbstractObservations 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 BySCI
Document Type期刊论文
Identifierhttp://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.
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