Physics
Scientific paper
Apr 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005kfnt...21...99s&link_type=abstract
Kinematika i Fizika Nebesnykh Tel, vol. 21, no. 2, p. 99-113
Physics
Scientific paper
We reproduced energetics of oscillations in the solar photosphere based on power spectra of temperature and velocity fluctuations. Acoustic oscillations of temperature and velocity in the solar photosphere are separated by k-ω filtering of time-spatial variations reproduced by solving the nonequilibrium inverse radiation transfer problem. Acoustic oscillation power is localized on meso-supergranulation scales in the range of five-minute oscillations. At the beginning of the overshooting convection region the power of temperature oscillations is suppressed by the wave scattering on convective nonuniformities. The power of the observed velocity spectrum is increased in the high-frequency range at these heights; that is due to distortion of wave fronts. High-frequency oscillations are trapped by the convective structure of the middle photosphere. The sources of five-minute and high-frequency oscillations are localized.
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