DOI: 10.1002/2015GL064865
论文题名: Near-Sun speed of CMEs and the magnetic nonpotentiality of their source active regions
作者: Tiwari S.K. ; Falconer D.A. ; Moore R.L. ; Venkatakrishnan P. ; Winebarger A.R. ; Khazanov I.G.
刊名: Geophysical Research Letters
ISSN: 0094-9236
EISSN: 1944-8967
出版年: 2015
卷: 42, 期: 14 起始页码: 5702
结束页码: 5710
语种: 英语
英文关键词: ARs
; CMEs
; speed
; vector magnetograms
Scopus关键词: Speed
; ARs
; CMEs
; Coronal mass ejection
; Integrated magnetic
; Magnetic energies
; Magnetic parameters
; Solar dynamics observatories
; Vector magnetograms
; Magnetism
; algorithm
; coronal mass ejection
; field method
; magnetic property
英文摘要: We show that the speed of the fastest coronal mass ejections (CMEs) that an active region (AR) can produce can be predicted from a vector magnetogram of the AR. This is shown by logarithmic plots of CME speed (from the SOHO Large Angle and Spectrometric Coronagraph CME catalog) versus each of ten AR-integrated magnetic parameters (AR magnetic flux, three different AR magnetic-twist parameters, and six AR free-magnetic-energy proxies) measured from the vertical and horizontal field components of vector magnetograms (from the Solar Dynamics Observatory's Helioseismic and Magnetic Imager) of the source ARs of 189 CMEs. These plots show the following: (1) the speed of the fastest CMEs that an AR can produce increases with each of these whole-AR magnetic parameters and (2) that one of the AR magnetic-twist parameters and the corresponding free-magnetic-energy proxy each determine the CME-speed upper limit line somewhat better than any of the other eight whole-AR magnetic parameters. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84938952069&doi=10.1002%2f2015GL064865&partnerID=40&md5=af852ba154af878a92e95ccca4611390
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8852
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: NASA Marshall Space Flight Center, Huntsville, AL, United States
Recommended Citation:
Tiwari S.K.,Falconer D.A.,Moore R.L.,et al. Near-Sun speed of CMEs and the magnetic nonpotentiality of their source active regions[J]. Geophysical Research Letters,2015-01-01,42(14).