[Mesa-users] Binaries and wide orbital separation

[Amedeo Romagnolo]

Hi Rob, you are right, sorry for not showing plots.
I believe it happens during the red giant phase , but I don't get which
kind of problems it might have encountered...
Here attached the inlists. I tried to keep them as simple as possible.


[image: image.png]


Cheers,

Amedeo


On Mon, 26 Oct 2020 at 09:48, Rob Farmer <r.j.farmer at uva.nl> wrote:

> Hi,
> It's hard to say what is happening without seeing both your inlists and
> any plots you have made to show what is going on.
>
> When do you reach the min timestep limit? What is your star doing at this
> time? Is it at the very start of RLOF? Or is it because your star has
> encountered problems in the core? Or somewhere else? We can't tell unless
> you make some plots to explore what is going on.
>
> Rob
>
>
> On Mon, 26 Oct 2020 at 08:24, Amedeo Romagnolo via Mesa-users <
> mesa-users at lists.mesastar.org> wrote:
>
>> Hi all,
>>
>> I have a problem when simulating the evolution of a binary system.
>> My goal would be to make the more massive star to go into RLOF, which is
>> easily doable when I'm not setting a wide orbital separation (like a period
>> in the order of 10^5 yr). In this case, instead, whatever I do, it seems
>> that the code stops because a too small timestep has been reached, and
>> therefore the star's radius has no time to grow enough to go beyond its
>> Roche Lobe radius.
>>
>> Do you have any recommendations in this regard?
>>
>> Additionally, just another small question: is there an output in MESA
>> that shows at the end of the simulation the final total metallicity of the
>> simulated star?
>>
>> Thanks in advance,
>>
>> Amedeo
>>
>>
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