Radiation-hydrodynamic waves in an optically gray atmosphere. I - Homogeneous model

Details Radiation-hydrodynamic waves in an optically gray atmosphere. I - Homogeneous model Radiation-hydrodynamic waves in an optically gray atmosphere. I - Homogeneous model

Apr 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...257..359d&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 257, no. 1, p. 359-365.

Computer Science

Sound

12

Gray Scale, Hydrodynamic Equations, Magnetohydrodynamic Waves, Radiative Transfer, Solar Atmosphere, Solar Oscillations, Atmospheric Temperature, Ideal Gas, Optical Thickness, Solar Convection (Astronomy), Sound Waves

Scientific paper

We consider the coupled set of equations of hydrodynamics and radiative transfer. Only radiative transfer is taken into account in the energy equation, while other mechanisms of heat transfer are ignored. Disturbances of the tensor of radiative pressure are included in the linearized momentum equation. This term proves to be of great importance for radiation-acoustic waves. LTE as well as a gray approximation and homogeneity of the atmosphere are assumed. The hydrodynamic equations are solved by using an exact solution of the radiative transfer equation (no Eddington approximation is made). The dispersion equation for the nonadiabatic oscillations is derived. This equation is valid for arbitrary optical thickness and generalizes all hitherto known results.

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