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HD 156324: a tidally locked magnetic triple spectroscopic binary with a disrupted magnetosphere
M. Shultz, Th. Rivinius, G. A. Wade +3
HD 156324 is an SB3 (B2V/B5V/B5V) system in the Sco OB4 association. The He-strong primary possesses both a strong magnetic field, and H emission believed to originate in its Ce…
Stellar parameters of Be stars observed with X-shooter
A. Shokry, Th. Rivinius, A. Mehner +10
Aims. The X-shooter archive of several thousand telluric star spectra was skimmed for Be and Be-shell stars to derive the stellar fundamental parameters and statistical properties,…
Spectroscopic and photometric oscillatory envelope variability during the S Doradus outburst of the Luminous Blue Variable R71
A. Mehner, D. Baade, J. H. Groh +7
To better understand the LBV phenomenon, we analyze multi-epoch and multi-wavelength spectra and photometry of R71. Pre-outburst spectra are analyzed with the radiative transfer co…
BRITEning up the Be Phenomenon
D. Baade, Th. Rivinius, A. Pigulski +13
Observations of 25 Ori much expand the picture derived of other early-type Be stars with BRITE and SMEI. Two instead of one difference frequencies rule the variability: (a) The low…
Short-term variability and mass loss in Be stars III. BRITE and SMEI satellite photometry of 28 Cygni
D. Baade, A. Pigulski, Th. Rivinius +11
The BRITE Constellation of nanosatellites obtained mmag photometry of 28 Cygni for 11 months in 2014-2016. Observations with the Solar Mass Ejection Imager in 2003-2010 and 118 H$α…
The life cycles of Be viscous decretion discs: time-dependent modelling of infrared continuum observations
Rodrigo G. Vieira, Alex C. Carciofi, Jon E. Bjorkman +3
We apply the viscous decretion disc (VDD) model to interpret the infrared disc continuum emission of 80 Be stars observed in different epochs. In this way, we determined 169 specif…