[Mesa-users] [mesa-users] Beyond the Hertzprung gap - Solar metallicity - Massive stars

[Ebraheem Farag]

Hello Amedeo,

You see that big density inversion near the surface? That's causing your
timestep dive. Try turning on MLT++ or superad_reduction.

see: https://lists.mesastar.org/pipermail/mesa-users/2023-March/014368.html
and : https://lists.mesastar.org/pipermail/mesa-users/2023-March/014368.html

-EbF

On Wed, Apr 5, 2023 at 6:08 AM Amedeo Romagnolo via Mesa-users <
mesa-users at lists.mesastar.org> wrote:

> Hi all,
>
> I have been struggling recently with evolving massive stars at solar
> metallicity beyond HG. As you can see below, my star (53 Msun at ZAMS) is
> stuck at what I deem to be the end of its HG phase (don't mind the
> incorrect labels on the HR diagram).
>
> I cannot wrap my head on what the problem is, since if I go to Mzams<52
> Msun I can easily go into the giant phase.
>
> It always stops due to timestep limit. Inlist attached.
>
> Thanks in advance for any help,
>
> Amedeo Romagnolo
>
> [image: image.png]
>
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