Random velocity field corrections of the f-mode. II. Vertical and horizontal flow

Details Random velocity field corrections of the f-mode. II. Vertical and horizontal flow Random velocity field corrections of the f-mode. II. Vertical and horizontal flow

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...272..601m&link_type=abstract

Astronomy and Astrophysics, Vol. 272, p. 601 (1993)

Astronomy and Astrophysics

Astrophysics

36

Helioseismology, F-Mode, Turbulence, Sun: Oscillations, Sun: Graunlation, Mhd, Turbulence

Scientific paper

The influence of a random flow on f-mode frequencies is assessed using a model in which the convection zone is represented by an incompressible fluid within which is a horizontal and vertical random flow. We derive an exact dispersion relation which is solved numerically. We find that the frequency ω of the f-mode is close to the parabola ω2 = gk(ρ1-ρ2)/(P1+P2) at low and intermediate horizontal wavenumbers k; but at high k it departs from the parabola, falling below it. Such a behaviour is in general agreement with recent observations.

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