[Mesa-users] Red Giant Evolution

[Abha Vishwakarma]

Hi Jared,

Thank you for your reply. I am using MESA version 23.05.1. I am trying to
reproduce a stellar profile from a different work, and upon comparison I
found that my metal mass fraction near the core is much higher than
theirs, when I compare the models at the same star_age. The final radius of
the star is also less than their work. I have been playing around with the
wind schemes to see how they affect the evolution of the star, but I don't
fully understand them. It seems as though my star starts to burn Helium
earlier than their model. Please let me know if I am missing something
here.

Thank you,
Abha

On Wed, Jul 24, 2024 at 12:36 AM Jared Goldberg <
jgoldberg at flatironinstitute.org> wrote:

> Hi Abha,
>
> A few questions:
>
> 1) What MESA revision are you using?
> 2) What do you mean by "much sooner"? When/where/under what conditions do
> you want or expect the star to start core He burning?
>
> In general, a 12Msun star will become a Red Supergiant, not a red giant,
> and it may even start core He burning while it is still crossing the
> Hertzsprung gap.
>
> Best,
> ~Jared
>
> On Tue, Jul 23, 2024 at 3:03 PM Abha Vishwakarma via Mesa-users <
> mesa-users at lists.mesastar.org> wrote:
>
>> Dear MESA Users,
>>
>> I am trying to evolve a 12 solar mass star with metallicity 0.01 to the
>> red giant phase. I am able to evolve it, but it is burning Helium into
>> metals much sooner than I want it to. I am not sure which controls I should
>> change to make sure this happens later. Is there any way I can achieve such
>> a model?
>>
>> Best,
>> Abha Vishwakarma
>> _______________________________________________
>> mesa-users at lists.mesastar.org
>> https://lists.mesastar.org/mailman/listinfo/mesa-users
>>
>>
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