The five-minute oscillations in the solar atmosphere

Details The five-minute oscillations in the solar atmosphere The five-minute oscillations in the solar atmosphere

Jul 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975soph...43...49c&link_type=abstract

Solar Physics, vol. 43, July 1975, p. 49-55.

Physics

4

Acoustic Excitation, Atmospheric Models, Oscillations, Solar Atmosphere, Velocity Distribution, Astronomical Models, Polytropic Processes, Radiative Transfer, Self Oscillation, Thermal Instability

Scientific paper

The acoustic overstability in a polytropic plane-parallel atmosphere with superadiabatic temperature gradient and radiative dissipation is demonstrated for optically thick disturbances. The periods of oscillation are found to be in the range from 250 to 480 sec and the associated wavelength is of the order of 4000 km. The five-minute oscillations in the solar surface are attributed to self-excited sound waves in a layer about 1000 km thick in the subphotospheric convection zone.

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