New Findings Supporting the Presence of Several Distinct Structures of Circumstellar Matter in B Lyrae

摘要

(1) 52 photographic and 651 electronic spectra were disentangled using the programKOREL. This led to the detection of a number of weak absorption lines originating in theatmosphere of the accretion disk. So far, the detection of this disk spectrum was only reportedfor the Si 6347 and 6371 A doublet. (2) The basic spectrophotometric quantities of 15 absorptionlines of the primary were measured and corrected for the orbital light changes in order toeliminate the contribution of the secondary light to the observed continuum level. After thecorrection, a significant phase dependency of the spectral-line characteristics near the primaryeclipse was detected. In all probability, another so far unknown absorption-line spectrum wasthus found. This spectrum may be due to additional absorption of light of the primary in oneof the jet-like structures and in the spherical gas envelope surrounding the accretion disk. Boththese structures are seen projected against the primary during its eclipse.