Publications (71)
New multiwavelength observations of the Of?p star CPD -28 2561
S. Hubrig, M. Schöller, A. Kholtygin +7
A rather strong mean longitudinal magnetic field of the order of a few hundred Gauss was detected a few years ago in the Of?p star CPD -28 2561 using FORS2 low-resolution spectropo…
The XMM-Newton EPIC X-ray Light Curve Analysis of WR 6
R. Ignace, K. G. Gayley, W. R. Hamann +4
We obtained four pointings of over 100 ks each of the well-studied Wolf-Rayet star WR 6 with the XMM-Newton satellite. With a first paper emphasizing the results of spectral analys…
A Multi-Phase Suzaku Study of X-rays from tau Sco
R. Ignace, L. M. Oskinova, M. Jardine +5
We obtained relatively high signal-to-noise X-ray spectral data of the early massive star tau Sco (B0.2V) with the Suzaku XIS instrument. This source displays several unusual featu…
Modelling X-ray variability in the structured atmospheres of hot stars
L. M. Oskinova, R. Ignace, J. C. Brown +1
We describe X-ray production in the atmospheres of hot, early-type stars in the framework of a ``stochastic shock model''. The extended envelope of a star is assumed to possess num…
X-ray Observations of Bow Shocks around Runaway O Stars. The case of Oph and BD+433654
J. A. Toalá, L. M. Oskinova, A. González-Galán +3
Non-thermal radiation has been predicted within bow shocks around runaway stars by recent theoretical works. We present X-ray observations towards the runaway stars Oph (Chand…
Polarization and SEDs from Microlensing of Circumstellar Envelopes
R. Ignace, J. E. Bjorkman, C. Bunker
Microlensing surveys have proven to be tremendously fruitful in providing valuable data products for many fields of astrophysics, from eclipse lightcurves for substellar candidates…