Coexistence of self-organized criticality and intermittent turbulence in the solar corona.
An extended data set of extreme ultraviolet images of the solar corona provided by the SOHO spacecraft is analyzed using statistical methods common to studies of self-organized criticality (SOC) and intermittent turbulence (IT). The data exhibit simultaneous hallmarks of both regimes: namely, power-law avalanche statistics as well as multiscaling of structure functions for spatial activity. This implies that both SOC and IT may be manifestations of a single complex dynamical process entangling avalanches of magnetic energy dissipation with turbulent particle flows.
Uritsky
Vadim M
VM
Complexity Science Group, Department of Physics and Astronomy, University of Calgary, Calgary, Alberta, Canada T2N 1N4. vuritsky@phas.ucalgary.ca
Paczuski
Maya
M
Davila
Joseph M
JM
Jones
Shaela I
SI