[mesa-users] dynamo effect on stellar str

[Craig Wheeler]

We had meant to add our prescription for the MRI dynamo
to MESA. Perhaps there can be some joining of forces here.

Craig Wheeler (for Manos, who did the work)

On 7/28/16 9:31 PM, Valery Pipin wrote:
> Dear  List,
>
> I wonder if MESA has a possibility to check effects of large-scale
> magnetic field and flow on the stellar structure.
>
> I have computed a set of nonlinear dynamo models. They include the 3D
> mean-field dynamo coupled with angular momentum balance and heat transport.
>
> The model use the reference thermodynamic  structure of a star 0.3Ms of
> age 1Gyr  which was computed with help of MESA using the solar composition.
>
> The equation for the mean-field heat transport was solved for
> perturbation of the mean entropy caused by effects of the global
> rotation and magnetic field.
>
> In 1D stellar structure code the effect of mixing due to meridional
> circulation can be treated as an addition to diffusion and effect of
> magnetic field via the averaged addition to pressure.
>
> Both factors vary along the radius. Can I add them to the code and in
> what place. I would appreciate if you have some example.
>
> The test suite contains example for 15M star with dynamo. I don't
> understand where parameters of the magnetic field are defined?
>
> Thanks
>
> Valery
>
>
>
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-- 
J. Craig Wheeler
Samuel T. and Fern Yanagisawa Regents Professor of Astronomy
President, American Astronomical Society, 2006-2008
Department of Astronomy
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http://www.as.utexas.edu/~wheel
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