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Solar internal rotation rate and the latitudinal variation of the tachocline

Basu, Sarbani; Antia, H. M.; Chitre, S. M.

A new set of accurately measured frequencies of solar oscillations is used to infer the rotation rate inside the Sun, as a function of radial distance as well as latitude. We have adopted a regularized least-squares technique with iterative refinement for both 1.5D inversion, using the splitting coefficients, and 2D inversion using individual m sp…

Effects of errors in the solar radius on helioseismic inferences

Basu, Sarbani

Frequencies of intermediate-degree f modes of the Sun seem to indicate that the solar radius is smaller than what is normally used in constructing solar models. We investigate the possible consequences of an error in radius on results for solar structure obtained using helioseismic inversions. It is shown that solar sound speed will be overestimat…