[Mesa-users] Luminosity or energy released by nuclear reactions in the PP chain CNO cycle in the solar main sequence phase

[Jon Brase]

I've wondered similar things. Normally, in the principal branch of the pp chain, He3+He3 -> He4 + 2 p happens quickly enough that little He3 is around long-term and the entire pp chain can be regarded as a single reaction, but for minimum-mass red dwarves proton burning and He3 burning are separate phases of the star's life. Of course, since He3 burning releases protons, some proton burning occurs during the He3 burning phase, so it would be nice to be able to view the rates of the two reactions separately during the He3 burning phase, as well as the transition between phases.

Dec 22, 2021 22:59:58 王浩 <wangfeihao at stu.xju.edu.cn>:


> Hello All,
> I wonder if MESA can be used to output the luminosity released by each nuclear reaction in the PP chain and CNO cycle of the solar main sequence stage. For example,Beryllium 7 captures electrons to produce lithium 7 and neutrinos in the ppII chain, Can we use MESA to output the energy (luminosity) released by this reaction?
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