[Mesa-users] the number density of free electrons in the core

[Francis Timmes]

super.

fxt



> On Mar 14, 2019, at 7:49 PM, Poojan Agrawal <poojanagrawal7 at gmail.com> wrote:
> 
> Thanks, Frank.
> It's working now.
> 
> Regards,
> Poojan
> 
> On Thu, 14 Mar 2019 at 20:16, Francis Timmes <fxt44 at mac.com> wrote:
> ye is the electron to baryon ratio and a profile output option:
> 
> ye = n_e / n_b 
> 
> where n_e is the number density of free electrons and n_b is the number density of baryons.
> 
> rho is the baryon mass density and a profile output option:
> 
> rho = n_b / N_A
> 
> where N_A is the avogadro number. hence,
> 
> n_e = ye * n_b = ye * rho * N_A
> 
> which one can form by post-processing a profile file or by doing the multiplication
> in a run_star_extras and output it as an extra column.
> 
> probably full ionization is assumed for the reported ye, but i haven't looked.
> 
> fxt
> 
> 
> 
> 
> 
> > On Mar 14, 2019, at 12:33 AM, Poojan Agrawal via Mesa-users <mesa-users at lists.mesastar.org> wrote:
> > 
> > Dear all,
> > 
> > I looking for a way to output the number density of free electrons in the core of a star.
> > 
> > I am unable to find any option for it in either history or profile defaults. Neither, I am able to locate the variable name so that I can output it by adding an extra column in run_star_extras?
> > Can you help me with it?
> > 
> > Thanks,
> > Poojan Agrawal
> >  
> > PhD Candidate
> > Centre for Astrophysics and Supercomputing
> > Swinburne University of Technology
> > Melbourne
> >  
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> > 
>