188 citations · 1.9k across the 55 of their papers we have counts for
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The Core Composition of a White Dwarf in a Close Double Degenerate System
S. Vennes, A. Kawka
We report the identification of the double degenerate system NLTT 16249 that comprises a normal, hydrogen-rich (DA) white dwarf and a peculiar, carbon-polluted white dwarf (DQ) sho…
VLT/X-shooter observations and the chemical composition of cool white dwarfs
Adela Kawka, Stephane Vennes
We present a model atmosphere analysis of cool hydrogen-rich white dwarfs observed at the Very Large Telescope (VLT) with the X-shooter spectrograph. The intermediate-dispersion an…
Discovery of a Bright, Extremely Low-Mass White Dwarf in a Close Double Degenerate System
S. Vennes, J. R. Thorstensen, A. Kawka +6
We report the discovery of a bright (V ~ 13.7), extremely low-mass white dwarf in a close double degenerate system. We originally selected GALEX J171708.5+675712 for spectroscopic…
The cool magnetic DAZ white dwarf NLTT 10480
Adela Kawka, Stephane Vennes
We have identified a new, cool magnetic white dwarf in the New Luyten Two-Tenths (NLTT) catalogue. The high proper-motion star NLTT 10480 (mu=0.5"/year) shows weak Zeeman-split lin…
On the nature of the Be star HR 7409 (7 Vul)
S. Vennes, A. Kawka, S. Jonic +6
HR 7409 (7 Vul) is a newly identified Be star possibly part of the Gould Belt and is the massive component of a 69-day spectroscopic binary. The binary parameters and properties of…
Pressure shifts and abundance gradients in the atmosphere of the DAZ white dwarf GALEX J193156.8+011745
S. Vennes, A. Kawka, P. Nemeth
We present a detailed model atmosphere analysis of high-dispersion and high signal-to-noise ratio spectra of the heavily polluted DAZ white dwarf GALEX J1931+0117. The spectra obta…