DOI: 10.1002/2014GL059319
论文题名: Cusp observation at Saturn's high-latitude magnetosphere by the Cassini spacecraft
作者: Jasinski J.M. ; Arridge C.S. ; Lamy L. ; Leisner J.S. ; Thomsen M.F. ; Mitchell D.G. ; Coates A.J. ; Radioti A. ; Jones G.H. ; Roussos E. ; Krupp N. ; Grodent D. ; Dougherty M.K. ; Waite J.H.
刊名: Geophysical Research Letters
ISSN: 0094-10301
EISSN: 1944-10032
出版年: 2014
卷: 41, 期: 5 起始页码: 1382
结束页码: 1388
语种: 英语
英文关键词: Cassini
; cusp
; dispersion
; plasma
; reconnection
Scopus关键词: Dispersion (waves)
; Dispersions
; Magnetopause
; Plasmas
; Spacecraft
; Cassini
; Characteristic signature
; cusp
; Favorable conditions
; In-situ instruments
; Magnetospheric cusps
; reconnection
; Saturn kilometric radiations
; Planets
; aurora
; latitude
; magnetosphere
; plasma
; Saturn
; space technology
英文摘要: We report on the first analysis of magnetospheric cusp observations at Saturn by multiple in situ instruments onboard the Cassini spacecraft. Using this we infer the process of reconnection was occurring at Saturn's magnetopause. This agrees with remote observations that showed the associated auroral signatures of reconnection. Cassini crossed the northern cusp around noon local time along a poleward trajectory. The spacecraft observed ion energy-latitude dispersions - a characteristic signature of the terrestrial cusp. This ion dispersion is "stepped," which shows that the reconnection is pulsed. The ion energy-pitch angle dispersions suggest that the field-aligned distance from the cusp to the reconnection site varies between ∼27 and 51 RS. An intensification of lower frequencies of the Saturn kilometric radiation emissions suggests the prior arrival of a solar wind shock front, compressing the magnetosphere and providing more favorable conditions for magnetopause reconnection. Key Points We observe evidence for reconnection in the cusp plasma at Saturn We present evidence that the reconnection process can be pulsed at Saturn Saturn's cusp shows similar characteristics to the terrestrial cusp ©2014. The Authors. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84895776887&doi=10.1002%2f2014GL059319&partnerID=40&md5=f695d8e202ed268db609b69d7afe372b
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7565
Appears in Collections: 气候减缓与适应
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作者单位: Mullard Space Science Laboratory, Department of Space and Climate Physics, University College London, Surrey, Dorking, United Kingdom
Recommended Citation:
Jasinski J.M.,Arridge C.S.,Lamy L.,et al. Cusp observation at Saturn's high-latitude magnetosphere by the Cassini spacecraft[J]. Geophysical Research Letters,2014-01-01,41(5).