HR: 16:15h
AN: SP14A-04    [Abstracts]
TI: Heating of Coronal Active Regions: Statistics of Dissipation Events from Reduced MHD Simulations
AU: * Gomez, D O
EM: dgomez@df.uba.ar
AF: Instituto de Astronomia y Fisica del Espacio, CC 67 - Suc. 28, Buenos Aires, 1428 Argentina
AU: * Gomez, D O
EM: dgomez@df.uba.ar
AF: Department of physics, University of Buenos Aires, Av. Cantilo 2620, Buenos Aires, 1428 Argentina
AU: Dmitruk, P
EM: pablo@bartol.udel.edu
AF: Bartol Research Institute, University of Delaware, 217 Sharp Lab., Newark, DE 19716 United States
AB: Within the reduced MHD approximation, we numerically simulate the dynamics of a coronal loop driven by a stationary velocity field at the photospheric boundaries. After several photospheric turnover times, a turbulent stationary regime is reached, characterized by a broadband power spectrum and heating rate levels compatible with the heating requirements of active region loops. The energy dissipation rate as a function of time displays a complex superposition of impulsive events, which we associate to the so-called nanoflares. A statistical analysis of these events yields a power law distribution as a function of their energies, which is consistent with those obtained for flare energy distributions reported from X-ray observations. We also study the distributions of peak dissipation rates, durations, and waiting times between events.
DE: 7509 Corona
DE: 7519 Flares
DE: 7843 Numerical simulation studies
DE: 7863 Turbulence
SC: Solar Physics Division - AAS [SP]
MN: 2005 Joint Assembly