Modeling a coronal loop heated by MHD-turbulence nanoflares

Abstract

We model the hydrodynamic evolution of the plasma confined in a coronal loop, 30000 km long, subject to the heating of nanoflares due to intermittent magnetic dissipative events in the MHD turbulence produced by loop footpoint motions. We use the time-dependent distribution of energy dissipation along the loop obtained from a hybrid shell model, occurring for a magnetic field of about 10 G in corona; the relevant heating per unit volume along the loop is used in the Palermo-Harvard loop plasma hydrodynamic model. We describe the results focussing on the effects produced by the most intense heat pulses, which lead to loop temperatures between 1 and 1.5 MK.

arXiv comment21 pages, 8 figures, journal article

References in corpus (7)

• Power Laws in Solar Flares: Self-Organized Criticality or Turbulence?
• Turbulent coronal heating and the distribution of nanoflares
• Dynamics of solar coronal loops II. Catastrophic cooling and high-speed downflows
• Scaling law for the heating of solar coronal loops
• Emission measure distribution in loops impulsively heated at the foot-points
• A nanoflare heating model for the quiet solar corona
• A simplified numerical model of coronal energy dissipation based on reduced MHD

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