[mesa-users] Core hydrogen mass fraction increases in early evolution of 1.5 Msun star

[Evan O'Connor]

Hi Rich,

If I recall, the ^3He fraction always goes down at the beginning (at 
least for massive stars), could it be from this? (i.e. 
r_he3_he3_to_h1_h1_he4 in basic_pp.net)  If not, watch the abundences in 
pgplot to see whats getting destroyed.

Evan

On 01/14/2013 12:21 PM, Richard Townsend wrote:
> Hi folks --
>
> I'm running a vanilla MESA (4740) calculation for a 1.5 Msun star, from MS to He flash. Surprisingly (to me), the core hydrogen mass fraction *rises* slightly during the early evolution (~timestep 170). Can anyone explain why this might be so? I attach the inlist.
>
> cheers,
>
> Rich
>
>
>
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