[Mesa-users] Turning off hydrogen recombination energy

[Ebraheem Farag]

Hello Natalie,

Have you evolved a stellar evolution model through the TP-AGB and
encountered this instability? Would you also mind sharing which version of
MESA you are using?

-EbF

On Thu, Jul 27, 2023 at 2:46 AM Natalie Rees via Mesa-users <
mesa-users at lists.mesastar.org> wrote:

> Dear mailing list,
>
>
>
> I am trying to prevent the hydrogen recombination instability in TP-AGB
> Stars (Wagenhuber & Weiss 1994,
> https://ui.adsabs.harvard.edu/abs/1994A%26A...290..807W/abstract
> <https://urldefense.com/v3/__https://ui.adsabs.harvard.edu/abs/1994A*26A...290..807W/abstract__;JQ!!IKRxdwAv5BmarQ!YxGy-aFmrhOGNZFQT85QQgwqwyfSS1mavuTbVhkxcQFrOHyHw7wz1UoEXEkRMHZnQZin14bXIOZhPDtBzW6nMl4U$>).
> To do so I want to try removing the energy produced by hydrogen
> recombination in the outer envelope temporarily. Does anyone have any
> guidance to as to how I could achieve this? I’ve tried playing around with
> the other_energy hook a bit but even if I inject a small amount of negative
> heat (small compared to the current energy of the shell) it causes
> convergence difficulties. Any advice or suggestions would be greatly
> appreciated.
>
>
>
> Many thanks,
>
> Natalie Rees
>
>
>
>
>
>
> _______________________________________________
> mesa-users at lists.mesastar.org
>
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