[mesa-users] Thermal timescale mass-transfer

[Pablo Marchant]

Jaime, I'm not sure what you mean with:

"cataclysmic variables evolves in this way as it should with the same test"

Are you saying you model a system where you evolve also the full structure
of the WD and somehow get a different result? Or you mean that other
published results say that and you're trying to reproduce them with MESA?
If so, could you provide a reference?

I also don't get what you say with:

" I would expect the system to evolve to shorter periods if it is in a
synchronous orbit through angular momentum loss"

Are you talking about magnetic braking here, which would take angular
momentum from the rotation of the star, which would then take angular
momentum from the orbit to go into synch? As far as I know, you can get
both systems that will get significantly closer to each other, and others
for which magnetic braking won't be strong enough, so they will just drift
apart. What initial periods are you using?


On Thu, Dec 19, 2013 at 9:46 PM, Jaime Villaseñor <
jaime.villasenor at postgrado.uv.cl> wrote:

> Dear mesa users,
>
> I've been trying to reproduce the evolution of a binary system that should
> enter into a thermal timescale mass-transfer phase with the "binary donor
> only" test. I found that at some point after mass transfer starts (around 5
> Gyr), the orbital period is dramatically increased from the initial 5 days
> to around 30 days. However, I would expect the system to evolve to shorter
> periods if it is in a synchronous orbit through
> angular momentum loss. I'm assuming this because cataclysmic variables
> evolves in this way as it should with the same test.
>
> Any idea on what am I missing here?
> I'm using mesa version 5595 and evolving a WD  of 0.8 solar masses and a
> donor of 1.3 Msun.
>
> Thanks as usually for your valuable help.
> Best, Jaime.
>
>
> --
> Jaime Villaseñor
> Master's student in Astrophysics
> Universidad de Valparaíso
>
>
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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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