Non-Lte Model Atmospheres.IV. Results for Multi-Line Computations

Results are presented for model atmospheres in hydrostatic, radiative, and steady-state statistical equilibrium, including bound-bound transitions. These calculations allow for the effects of Ha, HP, H , Pa, PP, and Ba. Stark profiles of Edmonds, Schinter, and Wells are used to compute detailed line profiles. With the full non-LTE calculation we have been able to predict correctly the entire line profile, including the line core. The wings of Ha are found to weaken while those of H remain unaffected by departures from LTE. Non-LTE effects strengthen the Paschen lines so that comparison of Paschen lines with Balmer lines should provide a sensitive observational indicator of departures from LTE. Ba has an emission core, because of a rise in surface temperature, and may be a useful diagnostic tool in the analysis of real stellar atmospheres. The surface-temperature rise found in earlier work persists, the boundary temperature differing little from that obtained by allowing for Ha, HP, and Pa only. The energy distribution in the continuum is little affected by departures from LTE, except at very low gravities and in the unobservable Lyman continuum.