MHD Wave Propagation in Open Flux Tubes in the Low Solar Atmosphere

Details MHD Wave Propagation in Open Flux Tubes in the Low Solar Atmosphere MHD Wave Propagation in Open Flux Tubes in the Low Solar Atmosphere

Jan 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004esasp.547..131j&link_type=abstract

Proceedings of 'SOHO 13 - Waves, Oscillations and Small-Scale Transient Events in the Solar Atmosphere: A Joint View from SOHO a

Computer Science

Scientific paper

The propagation of Alfvénic disturbances in open magnetic flux tubes in the low solar atmosphere is considered. Their evolution is studied numerically in a fully non-linear 1.5D MHD regime under the thin flux-tube approximation. In particular, the slippage between ion species, which are directly affected by changes in magnetic and electric fields, and the neutral fluids, which are affected only indirectly by collisional coupling, is considered. This slippage becomes non-negligible in the upper chromosphere for high frequency Alfvén waves (typically for frequencies of the order of 0.1 Hz) and the resulting wave damping and dissipation is included in our treatment. The disturbances are generated in the photosphere or low chromosphere by both Alfvén wave and random drivers, and over a wide range of parameters. Comparison is drawn with observed solar phenomena, particularly solar spicules.

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