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	Synthetic Spectral Analysis of a Kinetic Model for Slow-Magnetosonic Waves in Solar Corona
	Ruan, Wenzhi ; He, Jiansen ; Zhang, Lei ; Vocks, Christian ; Marsch, Eckart ; Tu, Chuanyi ; Peter, Hardi ; Wang, Linghua
	2016
关键词	MAGNETOACOUSTIC WAVES PROPAGATING DISTURBANCES PARTICLE INTERACTIONS COULOMB COLLISIONS POLAR PLUMES LOOPS OSCILLATIONS UPFLOWS HINODE/EIS SIGNATURE
英文摘要	We propose a kinetic model of slow-magnetosonic waves to explain various observational features associated with the propagating intensity disturbances (PIDs) occurring in the solar corona. The characteristics of slow mode waves, e.g, inphase oscillations of density, velocity, and thermal speed, are reproduced in this kinetic model. Moreover, the red-blue (R-B) asymmetry of the velocity distribution as self-consistently generated in the model is found to be contributed from the beam component, as a result of the competition between Landau resonance and Coulomb collisions. Furthermore, we synthesize the spectral lines and make the spectral analysis, based on the kinetic simulation data of the flux tube plasmas and the hypothesis of the surrounding background plasmas. It is found that the fluctuations of parameters of the synthetic spectral lines are basically consistent with the observations: (1) the line intensity, Doppler shift, and line width are fluctuating in phase; (2) the R-B asymmetry usually oscillate out of phase with the former three parameters; (3) the blueward asymmetry is more evident than the redward asymmetry in the R-B fluctuations. The oscillations of line parameters become weakened for the case with denser surrounding background plasmas. Similar to the observations, there is no doubled-frequency oscillation of the line width for the case with flux-tube plasmas flowing bulkly upward among the static background plasmas. Therefore, we suggest that the "wave + beam flow" kinetic model may be a viable interpretation for the PIDs observed in the solar corona.; NSFC [41222032, 41174148, 41574168, 41231069, 41274172, 41474148, 41421003]; CPCI-S(ISTP); jshept@gmail.com; 1720
语种	英语
出处	14th International Solar Wind Conference (Solar Wind)
DOI标识	10.1063/1.4943805
内容类型	其他
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/459693]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Ruan, Wenzhi,He, Jiansen,Zhang, Lei,et al. Synthetic Spectral Analysis of a Kinetic Model for Slow-Magnetosonic Waves in Solar Corona. 2016-01-01.

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