39 citations · 126 across the 9 of their papers we have counts for
9 papers
The Be star omicron Cas is indeed the primary of a triple system
Petr Harmanec, Stephenson Yang, Miroslav Slechta +3
Analysis of radial velocities of two narrow absorption components in the Mg II 4481 A line demonstrated that the secondary of the Be star omicron Cas is indeed a close binary syste…
The orbit and stellar masses of the archetype colliding-wind binary WR 140
Joshua D. Thomas, Noel D. Richardson, J. J. Eldridge +33
We present updated orbital elements for the Wolf-Rayet (WR) binary WR\,140 (HD\,193793; WC7pd + O5.5fc). The new orbital elements were derived using previously published measuremen…
A Coordinated X-ray and Optical Campaign of the Nearest Massive Eclipsing Binary, delta Orionis Aa: III. Analysis of Optical Photometric MOST and Spectroscopic (Ground Based) Variations
Herbert Pablo, Noel D. Richardson, Anthony F. J. Moffat +44
We report on both high-precision photometry from the MOST space telescope and ground-based spectroscopy of the triple system delta Ori A consisting of a binary O9.5II+early-B (Aa1…
Spectroscopic variability of two Oe stars
G. Rauw, T. Morel, Y. Naze +28
The Oe stars HD45314 and HD60848 have recently been found to exhibit very different X-ray properties: whilst HD60848 has an X-ray spectrum and emission level typical of most OB sta…
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…
The 2011 Periastron Passage of the Be Binary delta Scorpii
A. S. Miroshnichenko, A. V. Pasechnik, N. Manset +19
We describe the results of the world-wide observing campaign of the highly eccentric Be binary system delta Scorpii 2011 periastron passage which involved professional and amateur…
The WR 140 periastron passage 2009: first results from MONS and other optical sources
R. Fahed, A. F. J. Moffat, J. Zorec +29
We present the results from the spectroscopic follow-up of WR140 (WC7 + O4-5) during its last periastron passage in January 2009. This object is known as the archetype of colliding…
Variability monitoring of OB stars during the Mons campaign
T. Morel, G. Rauw, T. Eversberg +28
We present preliminary results of a 3-month campaign carried out in the framework of the Mons project, where time-resolved Halpha observations are used to study the wind and circum…
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…