The equatorial rotation rate of the supergranulation cells

Details The equatorial rotation rate of the supergranulation cells The equatorial rotation rate of the supergranulation cells

Jun 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980soph...66..213d&link_type=abstract

Solar Physics, vol. 66, June 1980, p. 213-221.

Physics

51

Equatorial Atmosphere, Solar Granulation, Solar Rotation, Velocity Distribution, Angular Momentum, Cross Correlation, Radial Flow, Solar Physics, Spectroheliographs

Scientific paper

The equatorial rotation rate of the supergranulation cells has been observed to be 14.72 plus or minus 0.07 deg/day. Velocity patterns observed at different times are cross-correlated to derive the rotation rate. The observed rate is 3% faster than recent observations of the surface rotation rate by Doppler shifts. The difference between the cell rate and surface rate is consistent with a model of the supergranular convection in which angular momentum per unit mass is conserved in the radial flow (Foukal, 1977).

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