The statistics of quiescent times tL between successive bursts of solar flares activity, performed using 20 years of data, displays a power law distribution with exponent a Ӎ 2.4. This is an indication of an underlying complex dynamics with long correlation times. The observed scaling behavior is in contradiction with the self-organized criticality models of solar flares which predict Poisson- like statistics. Chaotic models, including the destabilization of the laminar phases and subsequent restabilization due to nonlinear dynamics, are able to reproduce the power law for the quiescent times. A shell model of MHD turbulence correctly reproduces all the observed distributions.

Power laws in solar flares: Self-Organized Criticality or Turbulence?

CARBONE, Vincenzo;VELTRI, Pierluigi;
1999-01-01

Abstract

The statistics of quiescent times tL between successive bursts of solar flares activity, performed using 20 years of data, displays a power law distribution with exponent a Ӎ 2.4. This is an indication of an underlying complex dynamics with long correlation times. The observed scaling behavior is in contradiction with the self-organized criticality models of solar flares which predict Poisson- like statistics. Chaotic models, including the destabilization of the laminar phases and subsequent restabilization due to nonlinear dynamics, are able to reproduce the power law for the quiescent times. A shell model of MHD turbulence correctly reproduces all the observed distributions.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11770/124116
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