RANDOM VELOCITY-FIELD CORRECTIONS TO THE F-MODE .2. VERTICAL AND HORIZONTAL FLOW

Authors
MURAWSKI K ROBERTS B
Citation
K. Murawski et B. Roberts, RANDOM VELOCITY-FIELD CORRECTIONS TO THE F-MODE .2. VERTICAL AND HORIZONTAL FLOW, Astronomy and astrophysics, 272(2), 1993, pp. 601-608
Citations number
14
Categorie Soggetti
Astronomy & Astrophysics
Journal title
Astronomy and astrophysics → ACNP
ISSN journal
00046361
Volume
272
Issue
2
Year of publication
1993
Pages
601 - 608
Database
ISI
SICI code
0004-6361(1993)272:2<601:RVCTTF>2.0.ZU;2-3
Abstract
The influence of a random flow on f-mode frequencies is assessed using a model in which the convection zone is represented by an incompressi ble fluid within which is a horizontal and vertical random flow. We de rive an exact dispersion relation which is solved numerically. We find that the frequency omega of the f-mode is close to the parabola omega 2 = gk(rho1 - rho2)/(rho1 + rho2) at low and intermediate horizontal w avenumbers k; but at high k it departs from the parabola, falling belo w it. Such a behaviour is in general agreement with recent observation s.