by Mendoza M, Kaydul A, de Arcangelis L, Andrade Jr JS, Herrmann HJ
Abstract:
Solar flares stem from the reconnection of twisted magnetic field lines in the solar photo-sphere. The energy and waiting time distributions of these events follow complex patterns that have been carefully considered in the past and that bear some resemblance with earthquakes and stockmarkets. Here, we explore in detail the tangling motion of interacting flux tubes anchored in the plasma and the energy ejections resulting when they recombine. The mechanism for energy accumulation and release in the flow is reminiscent of self-organized criticality. From this model, we suggest the origin for two important and widely studied properties of solar flare statistics, including the time–energy correlations. We first propose that the scale-free energy distribution of solar flares is largely due to the twist exerted by the vorticity of the turbulent photosphere. Second, the long-range temporal and time–energy correlations appear to arise from the tube–tube interactions. The agreement with satellite measurements is encouraging.
Reference:
Modelling the influence of photospheric turbulence on solar flare statistics (Mendoza M, Kaydul A, de Arcangelis L, Andrade Jr JS, Herrmann HJ), In NATURE COMMUNICATIONS, volume 5, 2014. (Articolo in rivista)
Bibtex Entry:
@article{men14,
author = {Mendoza M, and Kaydul A, and de Arcangelis L, and Andrade Jr JS, and Herrmann HJ,},
pages = {1-8},
title = {Modelling the influence of photospheric turbulence
on solar flare statistics},
volume = {5},
note = {Articolo in rivista},
issn = {2041-1723},
journal = {NATURE COMMUNICATIONS},
doi = {10.1038/ncomms6035},
year = {2014},
scopusId = {2-s2.0-84923298603},
abstract = {Solar flares stem from the reconnection of twisted magnetic field lines in the solar photo-sphere. The energy and waiting time distributions of these events follow complex patterns
that have been carefully considered in the past and that bear some resemblance with earthquakes and stockmarkets. Here, we explore in detail the tangling motion of interacting
flux tubes anchored in the plasma and the energy ejections resulting when they recombine.
The mechanism for energy accumulation and release in the flow is reminiscent of self-organized criticality. From this model, we suggest the origin for two important and widely studied properties of solar flare statistics, including the time–energy correlations. We first
propose that the scale-free energy distribution of solar flares is largely due to the twist exerted by the vorticity of the turbulent photosphere. Second, the long-range temporal and
time–energy correlations appear to arise from the tube–tube interactions. The agreement with satellite measurements is encouraging.}
}