Abstract:
New molecular features due to YO and CeO arc reported present in the spectrum of pure S star R Cyg near minimum light. Of the nearly 60 unidentified features listed in the 4620-6420Å region, 10 with YO and II with CeO are identified. Bands of the Δv = 0, ±1, and -2 sequences of the blue-green system (B-X) of YO are identified for the first time in stellar spectra.
