Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984mmsai..55..267c&link_type=abstract
(European Physical Society, Ministero della Pubblica Istruzione, and Universita di Catania, EPS Study Conference on Oscillations
Astronomy and Astrophysics
Astronomy
9
Chromosphere, Magnetohydrodynamic Waves, Solar Atmosphere, Atmospheric Heating, Energy Budgets, Gravity Waves, Plasma Heating
Scientific paper
Attention is given to a theoretical model of the solar chromosphere based on heating by resistive disipation of Alfven-gravity waves, with the energy deposition by Joule effect balanced against losses by thermal radiation. The main input to the model is the exact calculation of the amplitudes and phases of the velocity perturbation, magnetic field, and electric current associated with an Alfven-gravity wave propagating vertically in the chromosphere. The analytical temperature and density profiles calculated from the theory are consistent with the empirical data from the BCA, HSRA and VAL81. A consequence of the model is that the Joule heating exceeds radiative losses up to 2.1 Mn above unit optical depth, and thus Alfven-gravity waves are responsible for the heating of the whole of the chromosphere, but not of the corona and transition region.
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