DOI: 10.1002/2015GL066374
论文题名: ACE observations of magnetic waves arising from newborn interstellar pickup helium ions
作者: Argall M.R. ; Fisher M.K. ; Joyce C.J. ; Smith C.W. ; Isenberg P.A. ; Vasquez B.J. ; Schwadron N.A. ; Skoug R.M.
刊名: Geophysical Research Letters
ISSN: 0094-8398
EISSN: 1944-8129
出版年: 2015
卷: 42, 期: 22 起始页码: 9617
结束页码: 9623
语种: 英语
英文关键词: ACE
; interstellar pickup ions
; magnetic waves
; solar wind
; wave excitation
Scopus关键词: Cyclotron resonance
; Cyclotrons
; Magnetism
; Pickups
; Solar wind
; Spacecraft
; ACE
; Advanced composition
; Circularly polarized
; Cyclotron frequency
; Magnetic waves
; Mean magnetic field
; Pick-up ions
; Wave excitation
; Ions
; ACE 1
; frequency analysis
; helium
; magnetic field
; polarization
; prediction
; solar wind
; spacecraft
; wave energy
英文摘要: We report low-frequency magnetic waves that were observed by the Advanced Composition Explorer (ACE) spacecraft on day of year 180 of 1999 with characteristics consistent with the predictions of waves excited by newborn interstellar pickup He+ ions. This event was found by examining daily spectrograms of MAG data, a new data product that is now available to the community via the ACE Science Center. The event shown here is one of approximately 20 similar events that will be analyzed in future studies. This event is fairly typical of those we have found so far. The waves exist at spacecraft-frame frequencies between the He+ cyclotron frequency and approximately twice the H+ cyclotron frequency. Fluctuations are transverse to the mean magnetic field, are noncompressive, circularly polarized, have field-aligned minimum variance directions, and are left-hand polarized in the spacecraft frame as predicted by theory. The event lasts for just under 1 h. Key Points Discovery of waves due to interstellar pickup He+ Such waves can be found at 1 AU The observations match theoretical predictions. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84956895813&doi=10.1002%2f2015GL066374&partnerID=40&md5=c8f14e7285605ee24b40d6d9be900bed
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8014
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Physics Department and Space Science Center, Morse Hall, University of New Hampshire, Durham, NH, United States
Recommended Citation:
Argall M.R.,Fisher M.K.,Joyce C.J.,et al. ACE observations of magnetic waves arising from newborn interstellar pickup helium ions[J]. Geophysical Research Letters,2015-01-01,42(22).