METAL LINE BLANKETED NON-LTE MODEL ATMOSPHERES FOR PLANETARY-NEBULA NUCLEI

We report on our recent progress in modeling non-LTE central star atmo spheres including blanketing by lines from the iron group elements. It is found that the spectroscopic analysis of the hottest stars (T(eff) almost-equal-to 90 000 K) based on hydrogen Balmer and He II lines is hardly affected by metal opacities in the models. As a consequence, r esults from earlier analyses based on models composed of hydrogen and helium only remain essentially unchanged.