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Title: On the hydrogen-deficient nature of Z Ursae Minoris
Authors: Goswami, A
Kameswara Rao, N
Lambert, D. L
Gonzalez, G
Keywords: Stars: Variables: Other;Stars: Abundances
Issue Date: May-1997
Publisher: The Astronomical Society of the Pacific
Citation: Publications of the Astronomical Society of Pacific, Vol. 109, No. 737, pp. 796 - 798
Abstract: Z Ursa Minoris was classified by Benson et al. (1994) a a R Coronae Borealis (RCB) variable star from its light variations. Hydrogen deficiency, which is a defining feature of RCB stars, was not established. To investigate this aspect we have obtained high resolution spectra in both blue (4200-4630\AA) and red (5050-7950\AA) regions. Lines of the CH molecule (G band) at about 4300\AA, which are present in spectra of N-type carbon stars are weak or absent in the spectrum of Z UMi indicating its hydrogen deficient nature and membership of the rare class of RCB variables. (SECTION: Stars)
ISSN: 0004-6280
Appears in Collections:IIAP Publications

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