[mesa-users] binary run with point mass taking tiny timesteps

Pablo Marchant pamarca at gmail.com
Wed Jun 26 07:35:22 EDT 2013


Jared, could you also share the the he_star_4.mod model to start things up?

Cheers

On Wed, Jun 26, 2013 at 1:17 AM, Jared Brooks <brooksjaredc at gmail.com>wrote:

> Hi Pablo,
>
> Here are my inlists, they are pretty basic.  And I'm using the newest
> released version of mesa, 5118
>
> -Jared
>
>
> On Tue, Jun 25, 2013 at 4:12 PM, Pablo Marchant <pamarca at gmail.com> wrote:
>
>> Jared,  could you please share your inlists for this case and your mesa
>> version?
>>
>> Cheers!
>> El 26/06/2013 00:08, "Jared Brooks" <brooksjaredc at gmail.com> escribió:
>>
>>>  I'm working with a binary run with a 0.4Msun helium star and a 0.6Msun
>>> point mass.  If I start with a small orbital period, say 20-40 minutes, the
>>> helium star doesn't have much time to evolve and it runs fine.  When I
>>> start with longer orbital periods, say 80-100 minutes, the helium has some
>>> time to do some core burning and build up some compositional gradients.
>>>  When RLOF exposes these gradients at the core-boundary, MESA starts taking
>>> very small timesteps and does not recover.  The mdot is also changing
>>> rapidly.
>>>
>>> I'm using the implicit controls, and have tried different overflow
>>> tolerances, but none seem to work.
>>>
>>> Thanks,
>>>
>>> Jared
>>>
>>>
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>


-- 
Pablo Marchant Campos
M.Sc on Astrophysics, Universidad Católica de Chile
PhD student, Argelander-Institut für Astronomie
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