[Mesa-users] Massive star evolution after CO core formation

[Francis Timmes]

hi jelena,

what is your inlist?

fxt




> On Sep 10, 2020, at 7:35 AM, Jelena Petrović <jpetrovic at aob.rs> wrote:
> 
> Hi,
> 
> Sorry, I forgot, the string swaps between 'newton iters' and 'max increase'.
> 
> Many thanks,
> Jelena
> 
> 
> 
> On 2020-09-10 14:51, Rob Farmer wrote:
>> Hi
>> Firstly, the terminal output contains a string in the bottom right
>> corner that tells you what is currently setting mesa's timestep. You
>> can then search for that string in the controls.default file to find
>> an appropriate control that you could tweak (or atleast use to
>> understand what physics is setting the current limit).
>> It's hard to say what is limiting your timesteps without seeing any
>> plots. I would suggest setting up the pgstar inlist from
>> https://zenodo.org/record/3986828 which will then contain alot of
>> information about your star and will make it much much easier to debug
>> why a problem is occurring.
>> Rob
>> On Thu, 10 Sep 2020 at 11:56, Jelena Petrović <jpetrovic at aob.rs>
>> wrote:
>>> Dear all,
>>> I am evolving massive stars (above 30Ms) and I have noticed that
>>> most of
>>> my models have problems evolving further than CO core,
>>> time steps get really small and models do not progress anymore.
>>> Only sometimes I manage to get the evolution all the way to Fe core.
>>> It
>>> seems that lower mass models do slightly better.
>>> I though this is because of extended hydrogen envelope, so I have
>>> tried
>>> to evolve helium stars. However, the same happens.
>>> When the core is about 25% C and 75% O, the models run, but with
>>> extremely small time steps.
>>> Just to note that stellar wind is also switched off to ensure that
>>> this
>>> is not the reason for smaller time steps.
>>> Does anybody know what could be the problem?
>>> Many thanks!
>>> Jelena
>>> ----------------------------------------
>>> Dr. Jelena Petrovic
>>> Senior Research Associate
>>> Astronomical Observatory Belgrade
>>> Serbia
>>> ----------------------------------------
>>> _______________________________________________
>>> mesa-users at lists.mesastar.org
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