Coronal heating mechanisms

Einaudi, G.; Velli, Marco

doi:10.1007/3-540-58041-7_212

Cited by 5 publications

(2 citation statements)

References 43 publications

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“…In the solar atmosphere, turbulence is externally driven by the convection zone, and the spontaneous formation of a turbulent reconnecting environment has been analyzed in several articles [12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Particle acceleration and heating in a turbulent solar corona

Vlahos

Isliker

2018

Plasma Phys. Control. Fusion

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Turbulence, magnetic reconnection, and shocks can be present in explosively unstable plasmas, forming a new electromagnetic environment, which we call here turbulent reconnection, and where spontaneous formation of current sheets takes place. We will show that the heating and the acceleration of particles is the result of the synergy of stochastic (second order Fermi) and systematic (first order Fermi) acceleration inside fully developed turbulence. The solar atmosphere is magnetically coupled to a turbulent driver (the convection zone), therefore the appearance of turbulent reconnection in the solar atmosphere is externally driven. Turbulent reconnection, once it is established in the solar corona, drives the coronal heating and particle acceleration. arXiv:1808.07136v1 [astro-ph.HE]

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Section: Introductionmentioning

confidence: 99%

Particle acceleration and heating in a turbulent solar corona

Vlahos

Isliker

2018

Plasma Phys. Control. Fusion

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“…Indeed, a large-scale quasi-uniform magnetic field tends to suppress the turbulence along it, and renders the flow quasi two-dimensional. MHD dissipative phenomena have been thought to be playing a role in the heating of stellar corona (Einaudi & Velli, 1993;Vlahos, 1993), but one difficulty comes from the fact that the Reynolds number is very large. Stated simply, the question is: how can we heat a medium (through dissipation of kinetic and magnetic energy) when the viscosity is so low ?…”

Section: The Two-dimensional Casementioning

confidence: 99%