Abstract
We have examined the extraordinarily rich WC spectrum of the nucleus of He 2–99, an object closely akin to BD +30°3639. In all, we log 25 lines in the UV (λ1240-λ1950; λ2550-λ3150) and 89 in the optical between λ3610 and λ7065 (including a small number of nebular features). We. provide a fundamental atlas for this class of star, wherein we give fluxes and identifications of the emission lines, including a detailed accounting of blends. The most powerful emissions are those of C III followed by C II and C IV. There is good indication that C I and even C V are present as well. Oxygen is well represented by 0 III; 0 II, 0 IV, and 0 V all appear present, but are generally confused by blends. Si III and Si IV appear, as do He I and He II. Other than N V, little case can be made for stellar nitrogen. The most serious barrier to analysis of the spectrum is the problem of coincidences and blends: there are few pure lines. Analysis of the nebular spectrum, which is severely contaminated by stellar line emission, indicates enrichment in carbon, but none in nitrogen.
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© 1989 International Astronomical Union
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Kaler, J.B., Shaw, R.A., Feibelman, W.A. (1989). A Case Study of a WC Nucleus. In: Torres-Peimbert, S. (eds) Planetary Nebulae. International Astronomical Union / Union Astronomique Internationale, vol 131. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-0865-9_119
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DOI: https://doi.org/10.1007/978-94-009-0865-9_119
Publisher Name: Springer, Dordrecht
Print ISBN: 978-0-7923-0003-8
Online ISBN: 978-94-009-0865-9
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