Statistical-Equilibrium Model Atmospheres for Early-Type Stars. II. Formation of the Lyman Continuum
Abstract
Results are presented for model atmospheres which allow for deviations from LTE in the first ten bound states of hydrogen. Particular attention is given to the problem of solving the transfer equation in the Lyman continuum, using the approach of introducing the appropriate statistical equilibrium equation explicitly into the expression for the source function. The solution is carried out using Feautrier's method which treats the transfer equation directly in its differential equation form. Full variation with depth and frequency of all relevant parameters is allowed. The present solutions are not yet fully physically realistic since transfer in the bound-bound transitions is not included. From the present work, however, it appears that use of Feautrier's method will allow the treatment of the complete problem.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- December 1967
- DOI:
- 10.1086/149391
- Bibcode:
- 1967ApJ...150..909M