Physics – Plasma Physics
Scientific paper
Jan 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989plap.work..107p&link_type=abstract
In ESA, Proceedings of an International School and Workshop on Plasma Astrophysics, Volume 1 p 107-110 (SEE N89-24910 18-75)
Physics
Plasma Physics
Coronal Loops, Energy Absorption, Magnetohydrodynamic Waves, Plasma Heating, Plasma Resonance, Digital Simulation, Ohmic Dissipation, Plasma Equilibrium, Plasma Physics, Radiation Absorption
Scientific paper
The heating of coronal loops by the process of resonant absorption of Alfven waves is studied in compressible, resistive magnetohydrodynamics. A one dimensional, cylindrical-symmetric plasma column excited periodically by means of an external driver is considered. The intrinsic dissipation spectrum which is independent of the external driver (whose power spectrum is not known) reveals interesting features of heating by resonant absorption. Resonant absorption is very efficient for typical coronal loop parameter values. A considerable part of the energy supplied by the external driver is dissipated ohmically and converted into heat. The energy dissipation rate is almost independent of the resistivity for the relevant values of this parameter. The efficiency of the heating mechanism strongly depends on the equilibrium profiles, the wave numbers, and the frequency of the external driver.
Goossens Marcel
Kerner Wolfgang
Poedts Stefaan
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