75 citations · 438 across the 35 of their papers we have counts for
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Three new hot hydrogen-deficient pre-white dwarfs
Klaus Werner, Nicole Reindl, Max Pritzkuleit +1
We have detected three new hydrogen-deficient (H < 0.001 mass fraction) pre-white dwarfs (WDs) with helium-dominated atmospheres. The first object is a relatively cool PG1159 star…
Examining the evolution of the Supersoft X-ray Source RX J0513.9-6951
A. Tavleev, V. F. Suleimanov, K. Werner +1
Supersoft X-ray sources (SSS) are thought to be accreting white dwarfs (WDs) in close binary systems, with thermonuclear burning on their surfaces. The SSS RX J0513.9-6951 in the L…
Ultraviolet spectroscopy of the supernova Ia hypervelocity runaway white dwarf J0927-6335
Klaus Werner, Kareem El-Badry, Boris T. Gänsicke +1
The hot white dwarf (WD) J0927-6335 (Gaia DR3 5250394728194220800, effective temperature T = 60,000 K, surface gravity log g = 7) was detected as the fastest known Gala…
Spectroscopic survey of faint planetary-nebula nuclei VI. Seventeen hydrogen-rich central stars
Nicole Reindl, Howard E. Bond, Klaus Werner +1
We present an analysis of 17 H-rich central stars of planetary nebulae (PNe) observed in our spectroscopic survey of nuclei of faint Galactic PNe carried out at the 10-m Hobby-Eber…
Spectral analysis of three hot subdwarf stars: EC 11481-2303, Feige 110, and PG 0909+276: A critical oscillator-strength evaluation for iron-group elements
A. Landstorfer, T. Rauch, K. Werner
For the precise spectral analysis of hot stars, advanced stellar-atmosphere models that consider deviations from the local thermodynamic equilibrium are mandatory. This requires ac…
Lithium Cepheid V708 Car with an unusual chemical composition
V. V. Kovtyukh, S. M. Andrievsky, K. Werner +2
The purpose of this work is to spectroscopically analyse the classical Cepheid V708 Car. A preliminary check of the spectrum of V708 Car showed that this is a lithium-rich supergia…