On the hydrogen-deficient nature of Z Ursae Minoris

Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/3233

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)
URI:	http://hdl.handle.net/2248/3233
ISSN:	0004-6280
Appears in Collections:	IIAP Publications

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