[mesa-users] Fwd: Re: D burning

Josiah Schwab jwschwab at berkeley.edu
Fri Dec 4 14:12:30 EST 2015

I forgot to cc mesa-users too.


On  4 December 2015 at 11:07 PST, Josiah Schwab wrote:

> Hi Michal,
> Please continue to cc mesa-users.  That way, when someone runs into a
> similar problem in the future, they can draw on our exchanges.
>> The weirdness I described earlier is still present (see the attached new
>> history.data). Up to model 76, MESA  reports a nonsense value of h2,
>> approx 7X10^-7. Then abruptly, center_h2 shows the correct value which
>> then decreases rapidly when Tc approaches 1X10^6.   I don't think the
>> very early models have much connection with physical reality but we
>> ought to know where strange values come from.
> It is also good practice to attach your inlist files, so that we can
> reproduce your run.  That said, I'm guessing that you are probably
> making a 0.5 Msun star with create_pre_main_sequence_model = .true.
> I just did that, and if you look at the first model, there is a big h2
> deficit in the center (see attached plot).  Then this is mixed out since
> the model is fully convective.  This explains the trend in center h2.
> Now, why does the initial model have that odd composition profile?  That
> question, I will defer to others.
> Hope that helps,
> Josiah

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