Radiation-hydrodynamic waves and global solar oscillations

Details Radiation-hydrodynamic waves and global solar oscillations Radiation-hydrodynamic waves and global solar oscillations

Jun 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994soph..152..227s&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 152, no. 1, p. 227-239

Physics

8

Brightness Distribution, Hydrodynamic Equations, Nonadiabatic Theory, Oscillating Flow, Solar Atmosphere, Wave Interaction, Acoustic Propagation, Fluctuation Theory, Local Thermodynamic Equilibrium, Radiative Heat Transfer, Stellar Models

Scientific paper

We investigate nonadiabatic hydrodynamic waves in a nongray, radiating, thermally conducting, homogeneous atmosphere in Local Thermodynamic Equilibrium (LTE) with a finite mean free path of photons. Avoiding the Eddington approximation the remaining simplifications in the basic equations are discussed, the generalized dispersion relation is analyzed, and some wave properties in a grey model are studied. The properties of waves in a stratified atmosphere are analyzed as well. In connection with the predicted properties of the nonadiabatic waves we discuss observations of p-modes by measuring brightness fluctuations.

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