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Optical and UV Nebular Spectra of NGC 40
Published online by Cambridge University Press: 18 September 2017
Extract
The planetary nebula NGC 40 has a WC8 central star. From analysis of IUE spectra of the star, Benvenuti, Perinotto and Willis (1981, IAU Symposium 99) obtain the remarkable abundance ratio C/He ~ 0.2 and probably no hydrogen. The question arises as to whether the nebular shell has abnormal abundances.
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- Copyright © Reidel 1983