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Could you please explain - How does the entropy diffusivity changes with radius in the Sun?

As far I know, In the convection zone, the entropy diffusivity increases as the temperature and density decrease further.

But I am not able to find a graph that shows relationship between entropy diffusivity and radius of the sun. Could you please let me know if you are aware of any such graph?

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    $\begingroup$ Sorry, I can't answer your question, but I do have luminosity data from the Standard Solar Model (BP2004), courtesy of John N. Bahcall, on GitHub. There's a simple demo in Sage / Python in a comment below the data. $\endgroup$
    – PM 2Ring
    Commented Jan 27, 2023 at 17:35

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