22 citations · 40 across the 22 of their papers we have counts for
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The Rotational Velocity of Helium-rich Pre-White Dwarfs
T. Rauch, S. Koeper, S. Dreizler +3
Previous investigations on hydrogen-rich white dwarfs generally yield only very small rotational velocities (v_rot sin i). We have analyzed line profiles in high-resolution optical…
The Enigma of AA Dor
T. Rauch, K. Werner
AA Dor (LB 3459) is an eclipsing, close binary (P = 0.26d) consisting of a sdOB primary star and an unseen secondary with an extraordinary small mass. The secondary is possibly a f…
Model Photospheres with Accelerated Lambda Iteration
K. Werner, J. L. Deetjen, S. Dreizler +3
We address the classical stellar-atmosphere problem and describe our method of numerical solution in detail. The problem consists of the solution of the radiation transfer equation…
FUSE Spectroscopy of the Two Prototype White Dwarfs With Signatures of a Super-hot Wind
K. Werner, S. Dreizler, J. W. Kruk +1
The O VIII phenomenon describes the occurrence of ultra-high ionization absorption lines of the CNO elements (e.g. O VIII, N VII, C VI, and even Ne X) in the optical spectra hot of…
Metal abundances in PG1159 stars from Chandra and FUSE spectroscopy
K. Werner, J. L. Deetjen, S. Dreizler +3
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 speculat…
NLTE Radiative Transfer and Model Atmospheres of Hot Stars
K. Werner
We describe our method to construct line blanketed NLTE model atmospheres for hot stars. We employ the Accelerated Lambda Iteration and use statistical methods to deal with metal l…