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A Three-Decade Outburst of the LMC Luminous Blue Variable R127 Draws to a Close
Nolan R. Walborn, Otmar Stahl, Roberto C. Gamen +7
The paradigmatic Luminous Blue Variable R127 in the Large Magellanic Cloud has been found in the intermediate, peculiar early-B state, and substantially fainter in visual light, si…
The weak magnetic field of the O9.7 supergiant zeta Orionis A
J. -C. Bouret, J. -F. Donati, F. Martins +4
We report here the detection of a weak magnetic field of 50 - 100 G on the O9.7 supergiant zeta Ori A, using spectropolarimetric observations obtained with NARVAL at the 2m Telesco…
Towards an understanding of the Of?p star HD191612: Phase-resolved multiwavelength observations
Yael Naze, Gregor Rauw, A. M. T. Pollock +2
We present the analysis of phase-resolved X-ray and optical observations of the peculiar hot star HD191612 (Of?p). This star is known to display line-profile variations that are re…
The surprising magnetic topology of tauSco: fossil remnant or dynamo output?
JF Donati, ID Howarth, MM Jardine +9
We report the discovery of a medium-strength (~0.5kG) magnetic field on the young, massive star tauSco (B0.2V), which becomes the third-hottest magnetic star known. Circularly pola…
Bright OB stars in the Galaxy - III. Constraints on the radial stratification of the clumping factor in hot star winds from a combined Halpha, IR and radio analysis
J. Puls, N. Markova, S. Scuderi +4
Recent results strongly challenge the canonical picture of massive star winds: various evidence indicates that currently accepted mass-loss rates, Mdot, may need to be revised down…
FUSE Observations of Variability in Hot-Star Winds
A. W. Fullerton, D. L. Massa, R. K. Prinja +3
New constraints on the large-scale wind structures responsible for discrete absorption components are obtained from far-ultraviolet time-series observations of O supergiants in the…