FUSE observations of hot white dwarfs

Details FUSE observations of hot white dwarfs FUSE observations of hot white dwarfs

2001-05-02

arxiv.org/abs/astro-ph/0105024v1

Astronomy and Astrophysics

Astrophysics

Scientific paper

10.1051/0004-6361:20010612

We have analyzed FUSE observations of six hot white dwarf stars: four DA white dwarfs with T_eff >= 45000K, the DAO Feige55 (T_eff = 55000K), and the DA CD -38 10980 (T_eff = 24000K). Photospheric lines from SiIV, PV, and SVI can be observed in the majority of the five hotter objects. Feige55 shows also several other heavier elements. The measured abundances agree only partly with the predictions of the radiative levitation theory. We attribute this to current limitations of the models and the probable presence of mass loss. In the spectrum of CD -38 10980, we have observed the quasi-molecular satellites of Lbeta. This confirms theoretical predictions about the visibility range for these features.

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