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NU Ori: a hierarchical triple system with a strongly magnetic B-type star
M. Shultz, J. -B. Le Bouquin, Th. Rivinius +13
NU Ori is a massive spectroscopic and visual binary in the Orion Nebula Cluster, with 4 components: Aa, Ab, B, and C. The B0.5 primary (Aa) is one of the most massive B-type stars…
Short-term variability and mass loss in Be stars IV. Two groups of closely spaced, approximately equidistant frequencies in three decades of space photometry of Puppis (B7-8 IIIe)
D. Baade, A. Pigulski, Th. Rivinius +13
In early-type Be stars, groups of nonradial pulsation (NRP) modes with numerically related frequencies may be instrumental for the release of excess angular momentum through mass-e…
A peculiar interacting Be star binary in the Small Magellanic Cloud
Ronald E. Mennickent, Thomas Rivinius, Lydia Cidale +2
We find that the emission line object OGLEJ005039.05-725751.4, a member of the cluster OGLE-CL SMC 64, exhibits a peculiar light curve pattern repeating with a recurrence time of 1…
The Remarkable Be+sdOB Binary HD 55606 I: Orbital and Stellar Parameters
S. Drew Chojnowski, Jonathan Labadie-Bartz, Thomas Rivinius +20
Prompted by peculiar spectroscopic variability observed in SDSS/APOGEE -band spectra, we monitored the Be star HD 55606 using optical spectroscopy and found that it is an exotic…
The life cycles of Be viscous decretion discs: The case of ω CMa
M. R. Ghoreyshi, A. C. Carciofi, L. R. Rimulo +6
We analyzed V-band photometry of the Be star ω CMa, obtained during the last four decades, during which the star went through four complete cycles of disc formation and dissipation…
The pulsationally modulated radial crossover signature of the slowly rotating magnetic B-type star CMa
M. Shultz, O. Kochukhov, G. A. Wade +1
We report the latest set of spectropolarimetric observations of the magnetic Cep star CMa. The new observations confirm the long-period model of Shultz et al.\ (2017), wh…