Short period acoustic heating theory and its application to the construction of model chromospheres

Details Short period acoustic heating theory and its application to the construction of model chromospheres Short period acoustic heating theory and its application to the construction of model chromospheres

Sep 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977mmsai..48..439u&link_type=abstract

(Advanced School of Astronomy, Course on the Sun, a Tool for Stellar Physics, 6th, Erice, Italy, Aug. 8-21, 1976.) Società Astro

Computer Science

Sound

3

Atmospheric Heating, Atmospheric Models, Chromosphere, Solar Atmosphere, Sound Waves, Acoustic Excitation, Damping, Isothermal Processes, Method Of Characteristics, Perturbation Theory, Piston Theory, Radiative Transfer, Wave Excitation

Scientific paper

Adiabatic linear waves in an isothermal gravitational atmosphere, nonlinear isentropic waves, nonlinear nonadiabatic waves in a nonisothermal gravitational atmosphere, and shocks are analyzed, and a perturbation method for nonlinear radiatively damped waves in a gravitational atmosphere is proposed. The time-independent approach to the construction of model chromospheres, based on heating formulas, is examined, showing that at heights below 1600 km, wave pressure, thermal conduction, viscosity, and the solar-wind mass and energy flow may be neglected. Time independent models of the chromosphere are constructed by solving the hydrostatic and energy equations, using a weak shock heating formula. Chromospheric heating mechanisms (short period acoustic heating theory) are compared with such heating mechanisms as gravity waves, five minute oscillations, Alfven waves, and magnetic field annihilation.

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