NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
The 1991 October 24 flare: A challenge for standard modelsThe M9.8 solar flare of 1991 October 24 22:30 UT presents several interesting characteristics: (1) energy release starts high in the corona; (2) the primary chromospheric ribbons are initially well separated and do not move apart at an observable rate; (3) no evidence is found for an erupting filament or other driver. To explain this flare, we consider several canonical flare models, including a filament eruption, a confined filament eruption, current interruption, and interacting loops. We conclude that none of these scenarios unequivocally explains this flare. Two possibilities which cannot be ruled out are (1) the eruption of a filament unobservable in H-alpha which starts high in the corona and produces no ribbon motions smaller than our detection threshold and no perceptible expansion of the coronal X-ray source, and (2) energy release due to spontaneous, propagating reconnection which allows the system to essentially brighten in place.
Document ID
19950041432
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Beaujardiere, J.-F. De LA
(Univ. of Hawaii, Honolulu, HI United States)
Canfield, R. C.
(Univ. of Hawaii, Honolulu, HI United States)
Hudson, H. S.
(Univ. of Hawaii, Honolulu, HI United States)
Wulser, J.-P.
(Univ. of Hawaii, Honolulu, HI United States)
Acton, L.
(Lockheed Palo Alto Research Lab. Palo Alto, CA, United States)
Kosugi, T.
(National Astronomical Observatory Tokyo, Japan)
Masuda, S.
(Nagoya Univ. Toyokawa, Japan)
Date Acquired
August 16, 2013
Publication Date
February 10, 1995
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 440
Issue: 1
ISSN: 0004-637X
Subject Category
Solar Physics
Accession Number
95A73031
Funding Number(s)
CONTRACT_GRANT: NSF ATM-93-03873
CONTRACT_GRANT: NSF AST-91-15038
CONTRACT_GRANT: NAS8-37334
CONTRACT_GRANT: NAGW-1542
Distribution Limits
Public
Copyright
Other

Available Downloads

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