KINETIC SIMULATION OF SLOW MAGNETOSONIC WAVES AND QUASI-PERIODIC UPFLOWS   IN THE SOLAR CORONA

doi:10.3847/0004-637X/825/1/58

CORC > 北京大学 > 地球与空间科学学院

	KINETIC SIMULATION OF SLOW MAGNETOSONIC WAVES AND QUASI-PERIODIC UPFLOWS IN THE SOLAR CORONA
	Ruan, Wenzhi ; He, Jiansen ; Zhang, Lei ; Vocks, Christian ; Marsch, Eckart ; Tu, Chuanyi ; Peter, Hardi ; Wang, Linghua
刊名	ASTROPHYSICAL JOURNAL
	2016
关键词	Sun: corona Sun: oscillations waves ACTIVE-REGION LOOPS PROPAGATING DISTURBANCES MAGNETOACOUSTIC WAVES MHD WAVES SPECTROSCOPIC OBSERVATIONS PARTICLE INTERACTIONS COULOMB COLLISIONS POLAR PLUMES ALFVEN WAVES WIND
DOI	10.3847/0004-637X/825/1/58
英文摘要	Quasi-periodic disturbances of emission-line parameters are frequently observed in the corona. These disturbances propagate upward along the magnetic field with speeds of similar to 100 km s(-1). This phenomenon has been interpreted as evidence of the propagation of slow magnetosonic waves or has been argued to be a signature of intermittent outflows superposed on the background plasmas. Here we aim to present a new "wave + flow" model to interpret these observations. In our scenario, the oscillatory motion is a slow-mode wave, and the flow is associated with a beam created by the wave-particle interaction owing to Landau resonance. With the help of a kinetic model, we simulate the propagation of slow-mode waves and the generation of beam flows. We find that weak periodic beam flows can be generated by to Landau resonance in the solar corona, and the phase with the strongest blueward asymmetry is ahead of that with the strongest blueshift by about 1/4 period. We also find that the slow wave damps to the level of 1/e after the transit time of two wave periods, owing to Landau damping and Coulomb collisions in our simulation. This damping timescale is similar to that resulting from thermal conduction in the MHD regime. The beam flow is weakened/attenuated with increasing wave period and decreasing wave amplitude since Coulomb collisions become more and more dominant over the wave action. We suggest that this "wave + flow" kinetic model provides an alternative explanation for the observed quasi-periodic propagating perturbations in various parameters in the solar corona.; NSFC [41574168, 41231069, 41274172, 41474148, 41421003, 41574166]; SCI(E); ARTICLE; jshept@gmail.com; 1; 825
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/491910]
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. KINETIC SIMULATION OF SLOW MAGNETOSONIC WAVES AND QUASI-PERIODIC UPFLOWS IN THE SOLAR CORONA[J]. ASTROPHYSICAL JOURNAL,2016.
APA	Ruan, Wenzhi.,He, Jiansen.,Zhang, Lei.,Vocks, Christian.,Marsch, Eckart.,...&Wang, Linghua.(2016).KINETIC SIMULATION OF SLOW MAGNETOSONIC WAVES AND QUASI-PERIODIC UPFLOWS IN THE SOLAR CORONA.ASTROPHYSICAL JOURNAL.
MLA	Ruan, Wenzhi,et al."KINETIC SIMULATION OF SLOW MAGNETOSONIC WAVES AND QUASI-PERIODIC UPFLOWS IN THE SOLAR CORONA".ASTROPHYSICAL JOURNAL (2016).