The decay of granular motions and the generation of gravity waves in the solar photosphere

Details The decay of granular motions and the generation of gravity waves in the solar photosphere The decay of granular motions and the generation of gravity waves in the solar photosphere

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...252..827k&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 252, no. 2, Dec. 1991, p. 827-834. Research supported by DFG.

Astronomy and Astrophysics

Astrophysics

14

Gravity Waves, Photosphere, Solar Atmosphere, Solar Granulation, Solar Gravitation, Correlation Coefficients, Energy Transfer, Power Spectra, Solar Oscillations

Scientific paper

The solar photosphere was investigated using a coherence analysis of rms-velocities. Results confirm that there is a distiction between the granular structures of the lower photosphere and the secondary structures of the higher photosphere. It is shown that the conversion of motions occurs well below a height of 200 km. In the layers of the higher photosphere (above 170 km) structures are found in the wavenumber range from 2.5 M/m to 7.0 M/m with a dominant scale of about 4.0 M/m. It is concluded that secondary motions are generated by decaying granular motions.

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