188 citations · 1.9k across the 64 of their papers we have counts for
8 papers · 1 filter
On the empirical evidence for the existence of ultra-massive white dwarfs
S. Vennes, A. Kawka
We re-examine the evidence for the existence of ultra-massive (M > 1.1 M_sun) white dwarfs based on gravitational redshift of white dwarfs in common proper motion binaries or in cl…
Orbital Parameters and Chemical Composition of Four White Dwarfs in Post-Common Envelope Binaries
Adela Kawka, Stephane Vennes, Jean Dupuis +2
We present FUSE observations of the hot white dwarfs in the post-common envelope binaries Feige 24, EUVE J0720-317, BPM 6502, and EUVE J2013+400. The spectra show numerous photosph…
The H-alpha stellar and interstellar emission in the open cluster NGC 6910
J. Kubat, D. Korcakova, A. Kawka +3
We verify the nature of emission-line stars in the field of the open cluster NGC 6910. % Spectroscopy in the H-alpha region was obtained. Raw CCD frames of spectra of all stars fai…
White Dwarfs in GALEX Survey
Adela Kawka, Stephane Vennes
We have cross-correlated the 2dF QSO Redshift Survey (2QZ) white dwarf catalog with the GALEX 2nd Data Release and the Sloan Digital Sky Survey (SDSS) data release 5 to obtain ultr…
Spectropolarimetric Survey of Hydrogen-rich White Dwarf Stars
A. Kawka, S. Vennes, G. D. Schmidt +2
We have conducted a survey of 61 southern white dwarfs searching for magnetic fields using Zeeman spectropolarimetry. Our objective is to obtain a magnetic field distribution for t…
LP 400-22, A very low-mass and high-velocity white dwarf
Adela Kawka, Stephane Vennes, Terry D. Oswalt +2
We report the identification of LP 400-22 (WD 2234+222) as a very low-mass and high-velocity white dwarf. The ultraviolet GALEX and optical photometric colors and a spectral line a…