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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…
On the Weak-Wind Problem in Massive Stars: X-ray Spectra Reveal a Massive Hot Wind in μ Columbae
David P. Huenemoerder, Lidia M. Oskinova, Richard Ignace +4
μ Columbae is a prototypical weak-wind O-star for which we have obtained a high-resolution X-ray spectrum with the Chandra LETG/ACIS-S instrument and a low resolution spectrum with…
Super-hard X-Ray Emission from eta Carinae Observed with Suzaku
Akiko Sekiguchi, Masahiro Tsujimoto, Shunji Kitamoto +4
We present the Suzaku results of eta Carinae in the 5--50 keV range conducted twice around the apastron in 2005 August for 50 ks and in 2006 February for 20 ks. The X-ray Imaging S…