Radiation-hydrodynamic waves and global solar oscillations |
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Authors: | J Staude N S Dzhalilov Y D Zhugzhda |
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Institution: | (1) Astrophys. Inst. Potsdam, Solar Observatory Einsteinturm, D-14473 Potsdam, Germany;(2) IZMIRAN, 142092 Troitsk city, Moscow Region, Russia |
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Abstract: | We investigate nonadiabatic hydrodynamic waves in a nongrey, radiating, thermally conducting, homogeneous atmosphere in 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 analysed, and some wave properties in a grey model are studied. The properties of waves in a stratified atmosphere are analysed as well. In connection with the predicted properties of the nonadiabatic waves we discuss observations ofp-modes by measuring brightness fluctuations. |
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