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

[Jelena Petrović]

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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