21 citations · 52 across the 4 of their papers we have counts for
4 papers
Time-dependent spectral-feature variations of stars displaying the B[e] phenomenon; I. V2028 Cyg
J. Polster, D. Korcakova, V. Votruba +4
We present results of nearly six years of spectroscopic observations of the B[e] star V2028 Cyg. The presence of the cold-type absorption lines combined with a hot-type spectrum in…
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…
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…
Properties and nature of Be stars XXIII. Long-term variations and physical properties of kappa Dra
S. M. Saad, J. Kubat, P. Koubsky +9
We present an analysis of new spectroscopic observations of the bright Be star kappa Dra obtained at the Ondrejov observatory during 1992 - 2003 and UBV photometric observations se…