DOI: 10.1002/2014GL062149
论文题名: Upstream and downstream wave packets associated with low-Mach number interplanetary shocks
作者: Goncharov O. ; Šafránková J. ; Němeček Z. ; Přech L. ; Pitňa A. ; Zastenker G.N.
刊名: Geophysical Research Letters
ISSN: 0094-9587
EISSN: 1944-9318
出版年: 2014
卷: 41, 期: 22 起始页码: 8100
结束页码: 8106
语种: 英语
英文关键词: interplanetary shocks
; plasma waves
Scopus关键词: Aerodynamics
; Interplanetary spacecraft
; Phase shift
; Phase shifters
; Plasma waves
; Shock waves
; Solar system
; Wave packets
; Downstream waves
; Frequency ranges
; Gyroradius
; Interplanetary shocks
; Kinetic process
; Low Mach numbers
; Magnetized plasmas
; Temperature variation
; Mach number
; frequency analysis
; magnetization
; observational method
; plasma
; reaction kinetics
; wavelength
英文摘要: Wave packets are frequently observed upstream and/or downstream of shocks in a magnetized plasma. We present a comparison of Wind and Spektr-R observations of 27 interplanetary low-Mach number (<5.5) shocks that reveals that (1) the wavelengths of both upstream and downstream waves conserve over the spacecraft separation, (2) in the frequency range of 0.5-5 Hz, their wavelengths are directly proportional to the shock ramp thickness that is controlled by the ion thermal gyroradius, and (3) the phase shift between density and temperature variations within downstream wave packets is about 90°. These results emphasize a role of kinetic processes in the formation of low-Mach number shocks. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84923329564&doi=10.1002%2f2014GL062149&partnerID=40&md5=156ccb407e7273bb575d3ed188edb9d1
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6851
Appears in Collections: 气候减缓与适应
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作者单位: Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic
Recommended Citation:
Goncharov O.,Šafránková J.,Němeček Z.,et al. Upstream and downstream wave packets associated with low-Mach number interplanetary shocks[J]. Geophysical Research Letters,2014-01-01,41(22).