NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Are CME 'interactions' Really Important for Accelerating Major Solar Energetic Particle Events?Recent studies have proposed that the presence or absence of an interaction with a preceding coronal mass ejection (CME) or other coronal structure within approximately 50R(sub s), of the Sun discriminates large, fast CMEs associated with major solar energetic particle (SEP) events from those that are not. We conclude that there is no compelling evidence that, if such interactions take place, they play an important role in SEP acceleration. Reasons include: The reported statistical results are consistent with a chance association between interacting CMEs and SEP events; Energetic SEPs are detected at Earth typically before or around the time when the primary CME enters the LASCO C2 field of view - interactions higher in the corona cannot play a role in acceleration of these particles; For approximately 60% of major SEP events in 1997-2001, the preceding CME fades into the background corona or is relatively narrow (less than 40 deg), suggesting any interaction will be weak; Radio signatures attributed to CME interaction occur after SEP acceleration has commenced.
Document ID
20030025228
Acquisition Source
Goddard Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Richardson, I. G.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Lawrence, G. R.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Haggerty, D. K.
(Johns Hopkins Univ. Laurel, MD, United States)
Kucera, T.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Szabo, A.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2002
Publication Information
ISSN: 0094-8276
Subject Category
Astrophysics
Distribution Limits
Public
Copyright
Public Use Permitted.
Document Inquiry

Available Downloads

There are no available downloads for this record.
No Preview Available