Paper:	Optical Spectrum of ZUMi during its Maximum Light
Volume:	391, Hydrogen-Deficient Stars
Page:	43
Authors:	Kipper, T.; Klochkova, V.G.
Abstract:	Using the high resolution spectrograph NES of the 6 m telescope we obtained and analysed the spectra of the RCrB type star ZUMi. The atmospheric parameters were estimated: Teff = 5250 ± 250K and log g = 0.5 ± 0.3. This places ZUMi among the coolest RCrB stars. We confirmed the hydrogen deficiency of ZUMi. The abundances of other elements resemble those found for the minority group of RCrB stars. We note a very low iron abundance, [Fe/H]=–1.85, and an essential excess of lithium, [Li/Fe]=+1.9.

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