[Mesa-users] Sommerfeld enhancement

[Francis Timmes]

the helmeos includes the effects of e+e- production in its 
thermodynamic quantities, with the actual physics coming from
the eos that builds the helmholtz free energy tables. 

that e+e- physics is solved by taking both the fermi-dirac integrals
and the root find on the electron chemical potential to the limits
of the arithmetic; no expansions are used or needed.

https://ui.adsabs.harvard.edu/abs/1999ApJS..125..277T/abstract
https://ui.adsabs.harvard.edu/abs/2000ApJS..126..501T/abstract
http://cococubed.asu.edu/code_pages/eos.shtml

fxt




> On Sep 3, 2020, at 1:22 PM, Jeremy Sakstein <sakstein at hawaii.edu> wrote:
> 
> Hi everyone,
> 
> I’ve been trying to figure out if Sommerfeld enhancement is included in the electron-positron pair production rates but I seem to be failing miserably.
> 
> I think the correct EOS of relevance is HELM.
> 
> Does anyone know if this is included, possibly with a reference?
> 
> Cheers,
> 
> Jeremy
> _______________________________________________
> mesa-users at lists.mesastar.org
> https://lists.mesastar.org/mailman/listinfo/mesa-users
>