[Mesa-users] Test suite in r15140

[Josiah Schwab]

Hi Kevin,

I'm trying to create a model of a ~0.9M white dwarf for further use in a
> binary simulation, and I can't find a test case in the test suite that will
> behave for the entire duration and produce a suitable saved model. Ideally
> I'd like to be able use something like 1M_pre_ms_to_wd or make_co_wd.
>

make_co_wd is likely to be the most suitable test case for doing this.  (A
~= 0.9 Msun WD descends from a ~= 5-7 Msun star, so is quite different from
the 1Msun evolution.)

I'm using MESA release r15140, and I've made the necessary adjustments to
> the paths and the controls so that the test doesn't end prematurely. Other
> than that, I've left everything as is, including the initial masses. But
> the cases never run to completion - for example, the 1M_pre_ms_to_wd case
> only ever gets as far as the inlist_to_end_agb inlist, and behaves rather
> pathologically during that too.
>

I'm confused about your statement that you don't change the initial mass.
That is the critical thing to produce a more massive WD.

Are you running all the parts of the test?  In r15140, this required
setting the environment variable MESA_RUN_OPTIONAL (or editing the rn file
so that all segments are executed).

Is there something fundamental that I'm not doing correctly? Are all these
> test cases meant to run more or less out of the box in this release of MESA?
>

The test cases are checked to run to completion out of the box exactly as
is.  Ideally, the test cases would be robust to small changes in the
parameters, but that is not always the case.

A design goal for make_co_wd is that it works for a range of masses.  I
know I have run models with ZAMS masses ~6Msun in that test case, though
I'm not certain it was in r15140.

I suggest you try editing the initial mass in make_co_wd (see
inlist_common), running the whole thing (doing MESA_RUN_OPTIONAL=t ./rn)
report back on how that goes.

Josiah
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