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One-dimensional solitary kinetic Alfven waves in low-beta plasma
Wang, X. Y.; Liu, Z. X.; Li, Z. Y.; 北京8701信箱
Department空间天气学国家重点实验室
Source PublicationPhysics of Plasmas
1998
Volume5Issue:12Pages:4395-4400
ISSN1070-664X
Language英语
AbstractA two-dimensional homogeneous magnetohydrodynamic (MHD) model is applied to investigate one-dimensional solitary kinetic Alfven waves (SKAWs) and their degenerated ion-acoustic solitons in a low-beta plasma, in which electron pressure and electron inertial effects are all taken into account. In contrast to the results of the one-dimensional SKAWs model obtained by Hasegawa and Mima [Phys. Rev. Lett. 37, 690 (1976)], Shukla et al [J. Plasma Phys. 28, 125 (1982)], and Wu et al. [Phys. Plasmas 3, 2879 (1996)], both density hump and dip Alvenic solitons are found to exist in the kinetic limit (2m(e)/m(i)much less than beta much less than 1) and in the inertial limit (beta much less than 2m(e)/m(i)) (beta=8 pi nTe/B02 denotes the ratio of the plasma thermal pressure to the magnetic pressure, while in the transition region (beta-2m(e)/m(i)), both super-Alfvenic and sub-Alfvenic solitons with a density hump or a dip are found to exist. Due to the finite-beta effect, the Alfvenic solitons may degenerate into super-acoustic density hump solitons over all the range of plasma beta. This result provides a one-dimensional SKAWs model to account for the observations from the Freja satellite, in which not only SKAWs accompanied by dip density solitons, but also SKAWs accompanied by hump density solitons, are found in the Earth's ionospheric altitude.
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/122/985
Collection空间科学部
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
Wang, X. Y.,Liu, Z. X.,Li, Z. Y.,et al. One-dimensional solitary kinetic Alfven waves in low-beta plasma[J]. Physics of Plasmas,1998,5(12):4395-4400.
APA Wang, X. Y.,Liu, Z. X.,Li, Z. Y.,&北京8701信箱.(1998).One-dimensional solitary kinetic Alfven waves in low-beta plasma.Physics of Plasmas,5(12),4395-4400.
MLA Wang, X. Y.,et al."One-dimensional solitary kinetic Alfven waves in low-beta plasma".Physics of Plasmas 5.12(1998):4395-4400.
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