[mesa-users] Evolving a pre-CV

Bill Paxton paxton at kitp.ucsb.edu
Wed Jun 5 14:09:03 EDT 2013

Hi Jaime,

Any luck so far?   You might start simple -- just use the "rlo" test suite case to model
the evolution of the donor while treating the companion as a point mass.
You can edit the "inlist_rlo" file to set initial masses for donor and companion
and an initial binary period.  It should happily evolve the binary using magnetic
braking before the gap and GR after to update the binary.  It should even make it through
the period minimum and keeping going until the donor is very small (0.02 Msun e.g.).

The "binary_rlo" test case is for cases in which you really must model the evolution
of both of the stars.  But if you can limit yourself to just doing one, then you don't
need that added complexity.   So I suggest you start with the simpler case.

Good luck,

On Jun 4, 2013, at 3:23 PM, Jaime Villaseñor wrote:

> Dear mesa users:
> I want to evolve a binary system that has passed through a common envelope phase. The system is in a detached configuration, it is loosing angular momentum due to magnetic braking and gravitational radiation and will eventually become a cataclysmic variable.
> I have only tested some of the examples in the test_suite directory, so I'm not sure what parameters I should change to make this work. I tried with the binary_rlo routine and I modified the masses and the orbital period in the inlist_rlo file but it's not working.
> Any help will be much appreciated.
> Cheers, Jaime.
> -- 
> Jaime Villaseñor
> Master's student in Astrophysics
> Universidad de Valparaíso
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