[Mesa-users] Convergence issues when modeling small planets in MESA 15140

[Bridget Haas]

Hi Josiah,

I have discussed this with Isaac, and after looking into the EOS issues he
and I were seeing in more detail, I determined that the main source of the
problems was the PTEH equation of state, not the ideal gas EOS as we had
initially suspected. Since PTEH was removed in 15140 and replaced with
FreeEOS, I would like to investigate whether these new tables produce
different results from what I was seeing before. I am still very
interested to see whether the CMS EOS provides even more improvement.

Thanks,
Bridget

On Wed, Feb 17, 2021 at 1:07 PM Josiah Schwab <jwschwab at ucsc.edu> wrote:

> Hi Bridget,
>
> I wanted to upgrade to the newest version 15140 to test the effects of the
>> new EOS options.
>>
>
> I didn't look at your models in any detail, but Isaac Malsky was at the
> edges of the EOS coverage and there have not yet been significant
> improvements in that area.  As you may have seen in the r15140 EOS docs,
> we're working on getting the Chabrier, Mazevet, & Soubiran (2019) H/He EOS
> into MESA, but It's not on by default (because it is not yet performing
> well and hasn't been tested).
>
> Josiah
>
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