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Title:
A simplified numerical model of coronal energy dissipation based on reduced MHD
Authors:
Buchlin, E.; Aletti, V.; Galtier, S.; Velli, M.; Einaudi, G.; Vial, J.-C.
Affiliation:
AA(Institut d'Astrophysique Spatiale, CNRS - Université Paris-Sud, Bât. 121, 91405 Orsay Cedex, France; Dipartimento di Astronomia e Scienza dello Spazio, Universitàdi Firenze, 50125 Firenze, Italy), AB(Institut d'Astrophysique Spatiale, CNRS - Université Paris-Sud, Bât. 121, 91405 Orsay Cedex, France), AC(Institut d'Astrophysique Spatiale, CNRS - Université Paris-Sud, Bât. 121, 91405 Orsay Cedex, France), AD(Dipartimento di Astronomia e Scienza dello Spazio, Universitàdi Firenze, 50125 Firenze, Italy; Istituto Nazionale Fisica della Materia, Sezione A, Universitàdi Pisa, 56100 Pisa, Italy), AE(Dipartimento di Fisica, Universitàdi Pisa, 56100 Pisa, Italy; Istituto Nazionale Fisica della Materia, Sezione A, Universitàdi Pisa, 56100 Pisa, Italy), AF(Institut d'Astrophysique Spatiale, CNRS - Université Paris-Sud, Bât. 121, 91405 Orsay Cedex, France)
Publication:
Astronomy and Astrophysics, v.406, p.1061-1070 (2003) (A&A Homepage)
Publication Date:
08/2003
Origin:
A&A
Astronomy Keywords:
magnetohydrodynamics (MHD), Sun: corona, Sun: flares, turbulence
DOI:
10.1051/0004-6361:20030730
Bibliographic Code:
2003A&A...406.1061B

Abstract

A 3D model intermediate between cellular automata (CA) models and the reduced magnetohydrodynamic (RMHD) equations is presented to simulate solar impulsive events generated along a coronal magnetic loop. The model consists of a set of planes distributed along a magnetic loop between which the information propagates through Alfvén waves. Statistical properties in terms of power-laws for energies and durations of dissipative events are obtained, {and their} agreement with X-ray and UV flares observations {is discussed}. The existence of observational biases is {also} discussed.
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