Solar flares: self-organization of active region to the critical state

• Published in: Proceedings of the International Astronomical Union Vol. 2004; no. IAUS223; pp. 477 - 478
• Main Authors: Osokin, A.R., Podlazov, A.V., Chernetsky, V.A., Livshits, M.A.
• Format: Journal Article
• Language: English
• Published: Cambridge, UK Cambridge University Press 01.06.2004
• Subjects: Avalanches; Contributed Papers; Energy; Russia
• ISSN: 1743-9213; 1743-9221
• DOI: 10.1017/S1743921304006581

Results of modern multi-wavelength observations of large solar non-stationary events are briefly summarized. Such events consist of a puls, an eruption (surge or CME) and a long-living system of giant arches. Observations demonstrate often that the pulse arises as a result of “avalanche” of interaction of small-scale magnetic elements, while the dynamic system transforms into a state of self-organizing criticality (SOC) on the post-eruptive phase. We developed new code for the avalanche model where it is possible to consider a transition of the active region as a dynamic system in a state of SOC. Derived solutions show, firstly, that the avalanche is naturally developed nearby spots during the pulse. Secondly, during long-duration events, occuring along the neutral line of the longitudinal magnetic field, behaviour of the large-scale coronal magnetic field is characterized by a state of SOC.To search for other articles by the author(s) go to: http://adsabs.harvard.edu/abstract_service.html