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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…
The close T Tauri binary system V4046 Sgr: Rotationally modulated X-ray emission from accretion shocks
C. Argiroffi, A. Maggio, T. Montmerle +11
We report initial results from a quasi-simultaneous X-ray/optical observing campaign targeting V4046 Sgr, a close, synchronous-rotating classical T Tauri star (CTTS) binary in whic…
High-resolution X-ray spectroscopy reveals the special nature of Wolf-Rayet star winds
L. M. Oskinova, K. G. Gayley, W. -R. Hamann +3
We present the first high-resolution X-ray spectrum of a putatively single Wolf-Rayet star. 400 ks observations of WR 6 by the XMM-Newton-telescope resulted in a superb quality hig…