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New observations of NGC 1624-2 reveal a complex magnetospheric structure and underlying surface magnetic geometry
A. David-Uraz, V. Petit, M. E. Shultz +5
NGC 1624-2 is the most strongly magnetized O-type star known. Previous spectroscopic observations of this object in the ultraviolet provided evidence that it hosts a large and dens…
MOBSTER -- V: Discovery of a magnetic companion star to the magnetic Cep pulsator HD 156424
M. E. Shultz, Th. Rivinius, G. A. Wade +5
HD 156424 (B2 V) is a little-studied magnetic hot star in the Sco OB4 association, previously noted to display both high-frequency radial velocity (RV) variability and magnetospher…
The Magnetic Early B-type Stars IV: Breakout or Leakage? H emission as a diagnostic of plasma transport in centrifugal magnetospheres
M. E. Shultz, S. Owocki, Th. Rivinius +15
Rapidly rotating early-type stars with strong magnetic fields frequently show H emission originating in Centrifugal Magnetospheres (CMs), circumstellar structures in which centr…
Chandra spectral measurements of the O supergiant Puppis indicate a surprising increase in the wind mass-loss rate over 18 years
David H. Cohen, Jiaming Wang, Véronique Petit +4
New long Chandra grating observations of the O supergiant Pup show not only a brightening of the x-ray emission line flux of 13 per cent in the 18 years since Chandra's first o…
Recent developments in determining the evolution of magnetic OB stars
Veronique Petit, Alexandre David-Uraz
We review recent developments in determining the evolution of magnetic massive OB stars. One of the important scientific questions is the completeness and the detection limits of c…
Study of slowly rotating CP stars observed with TESS
O. Kobzar, V. Khalack, D. Bohlender +10
Since the end of 2018, the Transiting Exoplanet Survey Satellite (TESS) provides high-quality space data on stellar photometry to the astronomical community. We present the results…