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Evidence for the importance of resonance scattering in X-ray emission line profiles of the O star Puppis
Maurice A. Leutenegger, Stanley P. Owocki, Steven M. Kahn +1
We fit the Doppler profiles of the He-like triplet complexes of \ion{O}{7} and \ion{N}{6} in the X-ray spectrum of the O star Puppis, using XMM-Newton RGS data collected over $…
Measurements and analysis of helium-like triplet ratios in the X-ray spectra of O-type stars
Maurice A. Leutenegger, Frits B. S. Paerels, Steven M. Kahn +1
We discuss new methods of measuring and interpreting the forbidden-to-intercombination line ratios of helium-like triplets in the X-ray spectra of O-type stars, including accountin…
Wind signatures in the X-ray emission line profiles of the late O supergiant Orionis
David H. Cohen, Maurice A. Leutenegger, Kevin T. Grizzard +3
X-ray line profile analysis has proved to be the most direct diagnostic of the kinematics and spatial distribution of the very hot plasma around O stars. In this paper we apply sev…