Publications (29)
Empirical Determination of Convection Parameters in White Dwarfs I : Whole Earth Telescope Observations of EC14012-1446
J. L. Provencal, M. H. Montgomery, A. Kanaan +55
We report on analysis of 308.3 hrs of high speed photometry targeting the pulsating DA white dwarf EC14012-1446. The data were acquired with the Whole Earth Telescope (WET) during…
Hot subdwarf wind models with accurate abundances I. Hydrogen dominated stars HD 49798 and BD+182647
J. Krticka, J. Janik, I. Krtickova +5
Hot subdwarfs are helium burning objects in late stages of their evolution. These stars can develop winds driven by light absorption in the lines of heavier elements. The wind stre…
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…
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…
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…
A FEROS Survey of Hot Subdwarf Stars
S. Vennes, P. Nemeth, A. Kawka
We have completed a survey of twenty-two ultraviolet-selected hot subdwarfs using the Fiber-fed Extended Range Optical Spectrograph (FEROS) and the 2.2-m telescope at La Silla. The…