Differential rotation, radiative equilibrium, and local hydrodynamic stability in stellar interiors by Caleo, A

“…In particular:</p> <ol type="a"><li>The data from helioseismology show that the upper radiative zone of the Sun is in near-uniform rotation, but they have a significant uncertainty. …”

A simple model for solar isorotational contours by Balbus, S

“…Although the exact solution of the global SCZ problem in principle requires this knowledge, even the simplest models produce striking results in broad agreement with helioseismology data. This includes horizontal (i.e. quasi-spherical) isorotational contours at the poles, axial contours at the equator and approximately radial contours at mid-latitudes. …”

Differential rotation in fully convective stars by Balbus, S, Weiss, N

“…Even at this early stage of development, this helioseismology fit may be used to put a lower bound on the mid-latitude radial solar entropy gradient, which is in good accord with standard mixing length theory. …”