35 citations · 93 across the 8 of their papers we have counts for
8 papers
V1294 Aql = HD 184279: A bad boy among Be stars or an important clue to the Be phenomenon?
P. Harmanec, H. Božić, P. Koubský +21
A reliable determination of the basic physical properties and variability patterns of hot emission-line stars is important for understanding the Be phenomenon and ultimately, the e…
Long-term, orbital, and rapid variations of the Be star V923 Aql = HD 183656
M. Wolf, P. Harmanec, H. Božić +9
We present the latest results of a long-term observational project aimed at observing, collecting from the literature, and homogenising the light, colour, and spectral variations o…
A new study of the spectroscopic binary 7 Vul with a Be star primary
P. Harmanec, J. Lipták, P. Koubský +5
We confirmed the binary nature of the Be star 7~Vul, derived a~more accurate spectroscopic orbit with an orbital period of (69.4212+/-0.0034) d, and improved the knowledge of the b…
The orbital elements and physical properties of the eclipsing binary BD+36 3317, a probable member of Lyr cluster
E. Kıran, P. Harmanec, Ö. L. Değirmenci +4
Context. The fact that eclipsing binaries belong to a stellar group is useful, because the former can be used to estimate distance and additional properties of the latter, and vice…
Calcium Emission in Interacting Binary Be Stars
Pavel Koubský, Lenka Kotková, Viktor Votruba +7
Polidan (1976) suggested that Be stars showing the CaII IR triplet in emission are interacting binaries. With the advent of the Gaia satellite, which will host a spectrometer to ob…
Properties and nature of Be stars: 29. Orbital and long-term spectral variations of γ Cassiopeiæ
J. Nemravová, P. Harmanec, P. Koubský +6
A detailed analysis of more than 800 electronic high-resolution spectra of gamma Cas, which were obtained during a time interval of over 6000 days (16.84 yrs) at several observator…
Properties and nature of Be stars: 27. Orbital and recent long-term variations of the Pleiades Be star Pleione = BU Tauri
J. Nemravová, P. Harmanec, J. Kubát +8
Radial-velocity variations of the H-alpha emission measured on the steep wings of the H-alpha line, prewhitened for the long-time changes, vary periodically with a period of (218.0…
False periods in complex chaotic systems
V. Votruba, P. Koubský, D. Korčáková +1
Astrophysical objects frequently exhibit some irregularities or complex behaviour in their light curves. We focus primarily on hot stars, where both radial and non-radial pulsation…