The effect of large-scale flows on oscillation ring diagrams

  • Frank Hill
Part IV Observations of Solar Oscillations
Part of the Lecture Notes in Physics book series (LNP, volume 367)


The effect of different flow scenarios on the solar oscillation ring diagrams is examined. Several combinations of longitudinal and latitudinal flow components as a function of depth are used to predict possible distributions of ring positions via the forward problem. The predicted positions are combined with plausible unperturbed dispersion relation parameters to produce sets of artificial rings. These rings are then fitted with ellipses, and the measured ellipse parameters are compared with observational results. The results indicate that the data are more compatible with the presence of local maxima in the depth dependence of both horizontal flow components, rather than constant slope solutions.


Local Maximum Velocity Curve Constant Slope Forward Calculation Artificial Ring 
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Copyright information

© Springer-Verlag 1990

Authors and Affiliations

  • Frank Hill
    • 1
  1. 1.National Solar ObservatoryTucsonUSA

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