Abstract
We investigate FUSE spectra of three PG1159 stars and do not find any evidence for iron lines. From a comparison with NLTE models we conclude a deficiency of 1–1.5 dex. We speculate that iron was transformed into heavier elements. A soft X-ray Chandra spectrum of the unique H- and He-deficient star H1504+65 is analyzed. We find high neon and magnesium abundances and confirm that H1504+65 is the bare core of either a C-O or a O-Ne-Mg white dwarf.
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Werner, K., Deetjen, J.L., Dreizler, S., Rauch, T., Barstow, M.A., Kruk, J.W. (2003). Metal Abundances in PG1159 Stars from Chandra and Fuse Spectroscopy. In: de Martino, D., Silvotti, R., Solheim, JE., Kalytis, R. (eds) White Dwarfs. NATO Science Series, vol 105. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0215-8_35
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DOI: https://doi.org/10.1007/978-94-010-0215-8_35
Publisher Name: Springer, Dordrecht
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