Metal abundances in PG1159 stars from Chandra and FUSE spectroscopy

Details Metal abundances in PG1159 stars from Chandra and FUSE spectroscopy Metal abundances in PG1159 stars from Chandra and FUSE spectroscopy

2002-08-28

arxiv.org/abs/astro-ph/0208505v1

Astronomy and Astrophysics

Astrophysics

To be published in: Proceedings 13th European Workshop on White Dwarfs, NATO Science Series, 4 pages, 1 figure

Scientific paper

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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