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An interpretation of density holes observed by Cluster and Double Star in solar wind
Qureshi, M. N. S.; Shi JianKui; Cheng ZhengWei; Liu ZhengXing; Shi, JK (reprint author), Chinese Acad Sci, Ctr Space Sci & Appl Res, State Key Lab Space Weather, Beijing 100190, Peoples R China.
Department空间科学部
Source PublicationCHINESE SCIENCE BULLETIN
2012
Volume57Issue:12Pages:1405-1408
ISSN1001-6538
Language英语
KeywordIon Density Hole Solar Wind Cluster And Double Star Observations Theoretic Interpretation
AbstractTo 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.; 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.
Indexed BySCI
Funding Project中国科学院空间科学与应用研究中心
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/3188
Collection空间科学部
Corresponding AuthorShi, JK (reprint author), Chinese Acad Sci, Ctr Space Sci & Appl Res, State Key Lab Space Weather, Beijing 100190, Peoples R China.
Recommended Citation
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,&Shi, JK .(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.
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