I have added 2 more sections to my, modelling spectral line profiles, Theory document:-
7.1 Multi-Layer Model Extension Applied to the Sun
7.2 Estimating Photosphere Pressure from Surface Gravity
I hope now to be able to:-
1 determine the pressure and thickness of a star’s photosphere
2 obtain a relation between the pressure impact parameter and photosphere temperature
I would welcome a “peer review” of this work.