FUSE Observations of the hottest DA white dwarfs

Details FUSE Observations of the hottest DA white dwarfs FUSE Observations of the hottest DA white dwarfs

2000-10-23

arxiv.org/abs/astro-ph/0010447v1

Astronomy and Astrophysics

Astrophysics

6 Pages, to be published in the Proceedings of the 12th European White Dwarf Workshop, Eds. H.L. Shipman and J.L. Provencal, A

Scientific paper

We report early FUSE observations of the very hot DA white dwarfs PG1342+444 and REJ0558-371. Detection of photospheric absorption lines allows us to estimate the abundances of C, O, Si, P, S and Fe, the first measurements reported for DA stars at such high temperatures. Values of Teff and log g determined for PG1342+444 from the Lyman line series disagree with the results of the standard Balmer line analysis, an issue that requires further investigation.

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