THE SPECTRUM OF THE COOL-R-CORONAE-BOREALIS VARIABLE S-APODIS IN A DEEP DECLINE

A high-resolution spectrum (5575-8875 Angstrom) of the cool R Coronae Borealis variable S Apodis in its 1993 deep decline is discussed. Narr ow or chromospheric emission lines of Na I, K I, Ca II, and Ba ii and broad emission lines of He I 7065 Angstrom and Na I D are seen, as exp ected from published reports of warmer RCBs in decline. The surprise o f the S Aps spectrum is the considerable blue shift of the broad emiss ion component to the Na D Lines. The blue shift may result from lines formed in a bipolar flow which is obscured asymmetrically by soot clou ds along the line of sight.