[mesa-users] Changes to the gravitational constant

[Earl Bellinger]

For a guide on writing a custom run_stars_extras.f, here are my notes
in case they are useful on Josiah Schwab's MESA Summer School 2016
tutorial:
https://research-engine.appspot.com/5791865672564736/wiki/page/Extending_MESA

Best regards,
Earl Bellinger

---
www.earlbellinger.com
Department of Astronomy, Yale University
Stellar Ages & Galactic Evolution Group, Max Planck Institute


On Wed, May 31, 2017 at 1:26 PM, Robert Farmer <rjfarmer at asu.edu> wrote:
>
> Hi
>
> You need to set the s%cgrav(1:s%nz) array with the value of the gravitational constant you want.
>
> Have a look in the $MESA_DIR/star/other/other_cgrav.f90 file for how to hook up an other_ routine for changing the cgrav value
>
> Rob
>
>
>
> On Wed, May 31, 2017 at 10:16 AM, Nsamba Benard <nsambabenard2net at gmail.com> wrote:
>>
>> Hello,
>>
>> We are trying to make some changes on the gravitational constant so that it varies with a parameter say radius.
>>
>> say.    Gnew = Go(1 + constant*radius)
>>
>> I am supposed to do this in the run_star_extras but not sure how to do it. Can someone help me how to incorporate this.
>>
>> Thank you.
>>
>> Cheers,
>> Benard
>> ----------------------------------------------------------------------------------------------------------
>> Benard Nsamba
>> PhD student                                  Centro de Astrofisica
>>                                                     Universidade do Porto
>>                                                     Rua das Estrelas
>> Tel: +351 920 404 108                   4150-762 Porto, Portugal
>> E-mail: benard.nsamba at astro.up.pt
>> Skype: benardnsamba
>>
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