Numerical simulations of fast MHD waves in a coronal plasma. I - Periodic linear pulsations

Details Numerical simulations of fast MHD waves in a coronal plasma. I - Periodic linear pulsations Numerical simulations of fast MHD waves in a coronal plasma. I - Periodic linear pulsations

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993soph..143...89m&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 143, no. 1, p. 89-105.

Physics

18

Computerized Simulation, Coronal Loops, Magnetoacoustic Waves, Plasma Waves, Solar Corona, Gas Density, Mathematical Models, Plasma Slabs, Solar Magnetic Field, Wave Dispersion

Scientific paper

The temporal evolution of ducted waves under coronal conditions is studied in the framework of linearized low beta MHD by means of numerical simulations. Coronal loops are represented by smoothed slabs of enhanced gas density embedded within a uniform magnetic field. The simulations show that for a smoothed density profile there is an energy leakage from the slab, associated with the propagation of sausage and kink waves. Wave energy leakage in the kink wave is generally small, whereas the wave energy in sausage waves leaks more strongly for long wavelengths and smoother slabs.

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