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

Published online by Cambridge University Press:  14 March 2005

A.R. Osokin ,
A.V. Podlazov ,
V.A. Chernetsky  and
M.A. Livshits
A.R. Osokin
Affiliation:
Sternberg State Astronomical Institute, Moscow State University, 119899 Moscow, Russia
A.V. Podlazov
Affiliation:
M.V. Keldysh Institute for Applied Mathematics Russian Academy of Sciences Miusskaya sq., 4. 125047 Moscow, Russia
V.A. Chernetsky
Affiliation:
Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation Russian Academy of Sciences 142190 Troitsk, Russia
M.A. Livshits
Affiliation:
Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation Russian Academy of Sciences 142190 Troitsk, Russia
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Abstract

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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

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2004 , Issue IAUS223 , June 2004 , pp. 477 - 478
Copyright
© 2004 International Astronomical Union