Alfvenic pulses in the solar atmosphere

Details Alfvenic pulses in the solar atmosphere Alfvenic pulses in the solar atmosphere

Sep 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...296..746m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 296, Sept. 15, 1985, p. 746-757.

Computer Science

Sound

24

Chromosphere, Coronal Loops, Magnetohydrodynamic Waves, Solar Physics, Conductive Heat Transfer, Energy Dissipation, Gravity Waves, Nonlinear Systems, Pulse Heating, Sound Waves

Scientific paper

Some nonlinear aspects of Alfvenic pulses propagating in coronal loops and the underlying chromosphere are numerically investigated. Heat conduction and radiation are included. The Alfvenic pulses are modeled as axisymmetric twists on a vertical cylindrical flux tube. They nonlinearly couple into acoustic-gravity waves propagating along the flux tube. A single Alfvenic pulse is found to leave two acoustic-gravity pulses in its wake. These pulses can result in significant motions of the transition region and underlying chromosphere. These motions do not resemble spicules, but they may correspond to a variety of observations indicating that the solar atmosphere is in a continual dynamic state. It is suggested that a dynamic chromosphere and transition region may be the inevitable consequence of the coronal heating process itself.

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