[mesa-users] Changes to the gravitational constant

[Dennis Stello]

You can also have a look at the mesastar.org and click Add-ons.

There is one example of changing G in fact.

Dennis/

On 1/06/2017 6:43, Earl Bellinger wrote:
> 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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