✦ LIBER ✦

The five-minute oscillations in the solar atmosphere

✍ Scribed by S. M. Chitre; M. H. Gokhale

Publisher: Springer
Year: 1975
Tongue: English
Weight: 370 KB
Volume: 43
Category: Article
ISSN: 0038-0938
DOI: 10.1007/bf00155141

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✦ Synopsis

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 250-480 s and the associated wavelength of the order of 4000 km. The five-minute oscillations in the solar surface are attributed to self-excited sound waves in a layer in the subphotospheric convection zone of about 1000 km thickness.

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