Alfvén gravity waves in viscous solar plasma: Effect of the background flow

doi:10.1016/j.asr.2018.09.028

	Alfvén gravity waves in viscous solar plasma: Effect of the background flow
	Kumar, Mukul; Chi, Wang
刊名	Advances in Space Research
	2018
ISSN号	0273-1177
DOI	10.1016/j.asr.2018.09.028
英文摘要	We study the Propagation and damping properties of Alfvén gravity waves in the presence of the vertical magnetic field in the viscous solar plasma under influence of the background flow by deriving a fourth order dispersion relation in terms of the Doppler shifted frequency. We derive the dispersion relation under WKB and Boussinesq approximation. We study the damping of Alfvén gravity waves for the wave frequencies less than and greater than the Brunt-Väisälä frequency. We find that the Brunt-Väisälä frequency divides the frequency ranges where the weakly or strongly damped oscillations occur. The background flow exhibits a strong effect on weakly damped oscillations and a weak effect on the strongly damped oscillations. We also notice that the damping of both the strong and weakly damped oscillations depend on the Brunt-Väisälä frequency and wave number. The effect of the background flow is also being governed by the Brunt-Väisälä frequency and wave number. We also study the properties of gravity wave mode after filtering the Alfvén wave mode by minimizing the magnetic field and noticed that the background flow shows a very strong effect on the gravity wave mode. © 2018 COSPAR
语种	英语
内容类型	期刊论文
源URL	[http://ir.nssc.ac.cn/handle/122/6554]
专题	国家空间科学中心_空间科学部
通讯作者	Kumar, Mukul
作者单位	State Key Laboratory of Space Weather, National Space Science Centre, Chinese Academy of Sciences, Beijing;100190, China
推荐引用方式 GB/T 7714	Kumar, Mukul,Chi, Wang. Alfvén gravity waves in viscous solar plasma: Effect of the background flow[J]. Advances in Space Research,2018.
APA	Kumar, Mukul,&Chi, Wang.(2018).Alfvén gravity waves in viscous solar plasma: Effect of the background flow.Advances in Space Research.
MLA	Kumar, Mukul,et al."Alfvén gravity waves in viscous solar plasma: Effect of the background flow".Advances in Space Research (2018).