ACOUSTIC-WAVE PROPAGATION IN THE SOLAR ATMOSPHERE .5. OBSERVATIONS VERSUS SIMULATIONS

We study the evolution of spectra of acoustic waves that are generated in the convection zone and propagate upward into the photosphere, whe re we compare the simulated acoustic spectra with the spectrum observe d in an Fe I line. Although there is no pronounced 3 min component in the spectra generated in the convection zone, there are dominant 3 min features in the theoretical spectra, in agreement with the observed s pectrum. We interpret the occurrence of the 3 min features as the resp onse of the solar atmosphere to the acoustic waves which shifts high f requency wave energy to low frequencies. We also find qualitative agre ement for the acoustic power between the wave simulations and the obse rvations.