Physics
Scientific paper
Jan 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982soph...75...35h&link_type=abstract
Solar Physics, vol. 75, Jan. 1982, p. 35-61.
Physics
133
Magnetic Flux, Magnetohydrodynamic Waves, Plasma Dynamics, Solar Atmosphere, Wave Propagation, Chromosphere, Nonlinear Systems, Shock Wave Propagation, Solar Corona, Spicules
Scientific paper
Consideration is given the nonlinear propagation of Alfven waves on solar magnetic flux tubes, where the tubes are taken to be vertical, axisymmetric and initially untwisted and the Alfven waves are time-dependent axisymmetric twists. The propagation of the waves into the chromosphere and corona is investigated through the numerical solution of a set of nonlinear, time-dependent equations coupling the Alfven waves into motions that are parallel to the initial magnetic field. It is concluded that Alfven waves can steepen into fast shocks in the chromosphere, pass through the transition region to produce high-velocity pulses, and then enter the corona, which they heat. The transition region pulses have amplitudes of about 60 km/sec, and durations of a few tens of seconds. In addition, the Alfven waves exhibit a tendency to drive upward flows, with many of the properties of spicules.
Galloway David
Hollweg Joseph V.
Jackson Stephen
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