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The pulsation modes of the pre-white dwarf PG 1159-035
J. E. S. Costa, S. O. Kepler, D. E. Winget +74
PG 1159-035, a pre-white dwarf with T_eff=140,000 K, is the prototype of both two classes: the PG1159 spectroscopic class and the DOV pulsating class. Previous studies of PG 1159-0…
On the origin of the ultramassive white dwarf GD50
P. D. Dobbie, R. Napiwotzki, N. Lodieu +3
We argue on the basis of astrometric and spectroscopic data that the ultramassive white dwarf GD50 is associated with the star formation event that created the Pleiades and is poss…
New Praesepe white dwarfs and the initial mass-final mass relation
P. D. Dobbie, R. Napiwotzki, M. R. Burleigh +6
We report the spectroscopic confirmation of four further white dwarf members of Praesepe. This brings the total number of confirmed white dwarf members to eleven making this the se…
FUSE and HST/STIS far-ultraviolet observations of AM Herculis in an extended low state
B. T. Gaensicke, K. S. Long, M. A. Barstow +1
We have obtained FUSE and HST/STIS time-resolved spectroscopy of the polar AM Herculis during a deep low state. The spectra are entirely dominated by the emission of the white dwar…
A search for binarity using FUSE observations of DAO white dwarfs
S. A. Good, M. A. Barstow, M. R. Burleigh +2
We report on a search for evidence of binarity in Far-Ultraviolet Spectroscopic Explorer (FUSE) observations of DAO white dwarfs. Spectra recorded by FUSE are built up from a numbe…
Photospheric phosphorus in the FUSE spectra of GD71 and two similar DA white dwarfs
Paul Dobbie, Martin Barstow, Ivan Hubeny +3
We report the detection, from FUSE data, of phosphorus in the atmospheres of GD71 and two similar DA white dwarfs. This is the first detection of a trace metal in the photosphere o…