194 citations · 265 across the 6 of their papers we have counts for
6 papers
Spectrum of the secondary component and new orbital elements of the massive triple star Delta Ori A
A. Oplištilová, P. Mayer, P. Harmanec +13
Orionis is the closest massive multiple stellar system and one of the brightest members of the Orion OB association. The primary (Aa1) is a unique evolved O star. In this work,…
A new look into the spectral and light variations of epsilon Aur
P. Harmanec, H. Božić, D. Korčáková +9
Investigating long series of spectral and photometric observations, we found that the orbital elements of epsilon Aur are subject to much larger uncertainties than usually believed…
Unique sextuple system: 65 Ursae Majoris
P. Zasche, R. Uhlář, M. Šlechta +4
Context. 65 UMa belongs to rather small group of stellar systems of higher multiplicity, whose inner and outer orbits are well-known. Methods: Photometric, spectroscopic, and inter…
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…