188 citations · 1.9k across the 64 of their papers we have counts for
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Accretion and diffusion in the DAZ white dwarf GALEX J1931+0117
Stephane Vennes, Adela Kawka, Peter Nemeth
We present an analysis of high-dispersion and high signal-to-noise ratio spectra of the DAZ white dwarf GALEX J1931+0117. The spectra obtained with the VLT-Kueyen/UV-Visual Echelle…
Abundance analysis of DAZ white dwarfs
Adela Kawka, Stephane Vennes, Frantisek Dinnbier +2
We present an abundance analysis of a sample of 33 hydrogen-rich (DA) white dwarfs. We have used archival high-resolution spectra to measure abundances of calcium, magnesium and ir…
A selection of hot subluminous stars in the GALEX survey I. Correlation with the Guide Star Catalog
S. Vennes, A. Kawka, P. Nemeth
We assembled a catalogue of bright, hot subdwarf and white dwarf stars extracted from a joint ultraviolet, optical, and infrared source list. The selection is secured using colour…
Spectroscopic analysis of the B/Be visual binary HR 1847
J. Kubát, S. M. Saad, A. Kawka +9
We studied both components of a slightly overlooked visual binary HR 1847 spectroscopically to determine its basic physical and orbital parameters. Basic stellar parameters were de…
Two new hot subdwarf binaries in the GALEX survey
A. Kawka, S. Vennes, P. Nemeth +2
We report the discovery of two new hot, hydrogen-rich subdwarfs (sdB) in close binary systems. The hot subdwarfs, GALEX J0321+4727 and GALEX J2349+3844, were selected from a joint…
The double degenerate system NLTT 11748
A. Kawka, S. Vennes, T. R. Vaccaro
We show that the extremely low-mass white dwarf NLTT 11748 (0.17 M_sun) is in a close binary with a fainter companion. We obtained a series of radial velocity measurements of the l…