Acoustic waves in the lower solar atmosphere

Details Acoustic waves in the lower solar atmosphere Acoustic waves in the lower solar atmosphere

Mar 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975soph...41...35c&link_type=abstract

Solar Physics, vol. 41, Mar. 1975, p. 35-42.

Physics

5

Acoustic Propagation, Atmospheric Heating, Chromosphere, Photosphere, Solar Atmosphere, Boundary Value Problems, Energy Dissipation, Lower Atmosphere, Radiation Effects, Shock Wave Propagation, Thermal Conductivity

Scientific paper

Propagation and dissipation of acoustic waves in the solar photosphere and lower chromosphere are investigated to determine the importance of acoustic waves as an atmospheric heating mechanism. The waves are assumed to be strictly monochromatic; propagation is analyzed in a linear approximation; and viscosity, thermal conductivity, and radiation effects are analyzed separately and then added together to obtain the total absorption coefficient. Equations for the acoustic energy flux are derived, and the shock formation height is calculated for different sets of initial conditions. It is shown that acoustic shocks form rather low in the atmosphere for all initial conditions and that the coronal heating agent must be some other type of wave, the most likely candidate being magnetohydrodynamic waves.

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