Solar rotation as a function of depth and latitude

Details Solar rotation as a function of depth and latitude Solar rotation as a function of depth and latitude

Oct 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985natur.317..591b&link_type=abstract

Nature (ISSN 0028-0836), vol. 317, Oct. 17, 1985, p. 591-594.

Physics

84

Angular Momentum, Image Analysis, Solar Oscillations, Solar Rotation, Depth, Dynamo Theory, Latitude, Power Spectra, Stellar Cores

Scientific paper

A five-day series of two-dimensional velocity images of the sun is analyzed to yield frequencies of solar p-mode oscillations with degrees between 8 and 50, with all azimuthal orders for each degree. The frequency splitting between modes with the same degree and radial order is related to the latitudinal variation of rotation, averaged over a depth range that depends on the degree. The observed splittings indicate that for distances between 0.3 and 0.7 solar radii, the solar latitudinal differential rotation is much smaller than at the surface (rotation roughly constant on spheres), and moreover that the rotation rate is close to the surface equatorial value.

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