[Mesa-users] Theoretical question about ionization

Evan Bauer evan.bauer.astro at gmail.com
Mon Feb 6 20:31:41 UTC 2023

Hi Jaime,

Could you provide some more detail about what kind of stellar model you're looking at, which MESA version you're using, and which specific output from MESA you're using to quantify ionization? There are a few possible answers to your question depending on those details.


> On Feb 4, 2023, at 11:58 AM, Jaime Montes Norniella via Mesa-users <mesa-users at lists.mesastar.org> wrote:
> The MESA profiles frequently show an ionization gap in between the nucleus and the atmosphere, but much more near the nucleus.
> I think that this gap is because de lack of pressure ionization once the pressure decays away of the nucleus.
> Ionization returns to be complete farther away supposedly by the major effect of temperature which decays slowly.
> My question is: How MESA implements pressure ionization, knowing that no perfect theory is at hand (Kippenhahn, Stellar Structure, page 138)?
> All your ideas are welcome.
> Thanks.
> Jaime Montes.
> University of Salamanca, Spain._______________________________________________
> mesa-users at lists.mesastar.org
> https://lists.mesastar.org/mailman/listinfo/mesa-users

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