Abstract
We present an analysis of high-resolution spectra of several symbiotics and symbiotic novae. We show that the emission lines are severely affected by differential extinction caused by absorption lines in the wind of the red giant companion. The major source of the absorbing spectrum is the forest of lines produced by neutral and singly ionized iron peak elements. We present models for the effects of this iron curtain, and we show that some of the outstanding anomalies in the emission-line fluxes results from the differential absorption by the environment as the path length along the line-of-sight changes
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