An interpretation of density holes observed by Cluster and Double Star in solar wind

	An interpretation of density holes observed by Cluster and Double Star in solar wind
	Qureshi, M. N. S.; Shi JianKui; Cheng ZhengWei; Liu ZhengXing
刊名	CHINESE SCIENCE BULLETIN
	2012
卷号	57 期号:12 页码:1405-1408
关键词	ion density hole solar wind Cluster and Double Star observations theoretic interpretation
ISSN号	1001-6538
通讯作者	Shi, JK (reprint author), Chinese Acad Sci, Ctr Space Sci & Appl Res, State Key Lab Space Weather, Beijing 100190, Peoples R China.
中文摘要	To interpret density holes in the solar wind, which are nonlinear structures observed by Cluster and Double Star, we propose an electrostatic ion fluid model. We derive the Sagdeev potential from the magnetohydrodynamic (MHD) equations and study the characteristics of nonlinear structures in our model. The results show that density depletions (or holes) can develop from linear ion acoustic waves or ion cyclotron waves in space plasmas when parameters such as Mach number, initial electric field and ratio of ion to electron temperature satisfy certain conditions. In our model, the relative density depletion (or density holes) is from 0 to 1, and the time duration of density holes is from 2 s to more than 98 s. These are in good agreement with the observations by Cluster and Double Star in the solar wind. Our model also shows that the density holes should be accompanied by bipolar electric field solitary structures, which have also been observed by Cluster in the solar wind.
英文摘要	To interpret density holes in the solar wind, which are nonlinear structures observed by Cluster and Double Star, we propose an electrostatic ion fluid model. We derive the Sagdeev potential from the magnetohydrodynamic (MHD) equations and study the characteristics of nonlinear structures in our model. The results show that density depletions (or holes) can develop from linear ion acoustic waves or ion cyclotron waves in space plasmas when parameters such as Mach number, initial electric field and ratio of ion to electron temperature satisfy certain conditions. In our model, the relative density depletion (or density holes) is from 0 to 1, and the time duration of density holes is from 2 s to more than 98 s. These are in good agreement with the observations by Cluster and Double Star in the solar wind. Our model also shows that the density holes should be accompanied by bipolar electric field solitary structures, which have also been observed by Cluster in the solar wind.
学科主题	空间物理
收录类别	SCI
资助信息	National Natural Science Foundation of China [41074114, 40921063, 40804031]; Specialized Research Fund for State Key Laboratories of China
语种	英语
公开日期	2014-12-15
内容类型	期刊论文
源URL	[http://ir.nssc.ac.cn/handle/122/3188]
专题	国家空间科学中心_空间科学部
推荐引用方式 GB/T 7714	Qureshi, M. N. S.,Shi JianKui,Cheng ZhengWei,et al. An interpretation of density holes observed by Cluster and Double Star in solar wind[J]. CHINESE SCIENCE BULLETIN,2012,57(12):1405-1408.
APA	Qureshi, M. N. S.,Shi JianKui,Cheng ZhengWei,&Liu ZhengXing.(2012).An interpretation of density holes observed by Cluster and Double Star in solar wind.CHINESE SCIENCE BULLETIN,57(12),1405-1408.
MLA	Qureshi, M. N. S.,et al."An interpretation of density holes observed by Cluster and Double Star in solar wind".CHINESE SCIENCE BULLETIN 57.12(2012):1405-1408.