Random velocity field corrections of the f-mode. I. Horizontal flows

Details Random velocity field corrections of the f-mode. I. Horizontal flows Random velocity field corrections of the f-mode. I. Horizontal flows

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...272..595m&link_type=abstract

Astronomy and Astrophysics, Vol. 272, p. 595 (1993)

Astronomy and Astrophysics

Astrophysics

46

Helioseismology F-Mode, Stochastic Field, Sun: Oscillations, Sun Granulation Mhd

Scientific paper

The influence of granulation (modelled as a random flow) on f-mode frequencies is evaluated theoretically for a simple model of the solar plasma. Frequency changes due to the presence of a stochastic flow are calculated analytically in the long wavelength limit, and numerically for arbitrary wavelength. Frequencies ω are close to the parabola ω2 = qk at low and intermediate wavenumbers k; but at high k they fall below the parabola. Such a behaviour is in agreement with recent solar observations.

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