I have a question for you Tim. Helioseismology studies have suggested a rigid-like rotating core between ~0.2Rs to 0.7Rs with the [assumed] differencial rotation of the radiative layer above that. Can you speculate on what that rigidly rotating "body" might be comprised of?

Is it possible that the solar magnetic field is generated in the same basic method as Earth's--that is to say, is it related to the different rotational speeds between the core and radiation zone combined with the convectiion of that radiative zone?

Do you think there is an equivalent to the D" layer seen at the mantle/core boundary of Earth?

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