[Mesa-users] Producing a medium to high mass pure Helium star

[Charlie Sharpe]

Hello,

I am currently trying to simulate a pure Helium star. Everything seems to
run smoothly for masses below 0.8 M_solar in the sense that the code
doesn't freeze out (see below). However, as soon as I set a mass above 0.8
M_solar, such as 1 M_solar shown here, the time steps become smaller and
smaller and the code freezes out. I let it run for 42000 models, where in
the first 4000 models it progressed about 1.5e7 years, but in the last
38000 models it only progressed a further 2.5e4 years with no indication of
any significant further progress.

I have attached a screenshot of the T - rho profile from one of the models
towards the end of the run in case you were curious as to what stage it
freezes at.

I have also attached my inlist. Any help as to why this would be
occurring and/or how to fix it would be absolutely awesome.

Kind regards,
Charlie
[image: Screen Shot 2021-05-19 at 8.52.27 pm.png]
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