259 citations · 3.5k across the 83 of their papers we have counts for
4 papers · 1 filter
A generalised porosity formalism for isotropic and anisotropic effective opacity and its effects on X-ray line attenuation in clumped O star winds
Jon O. Sundqvist, Stanley P. Owocki, David H. Cohen +2
We present a generalised formalism for treating the porosity-associated reduction in continuum opacity that occurs when individual clumps in a stochastic medium become optically th…
The nature and consequences of clumping in hot, massive star winds
Jon O. Sundqvist, Stanley P. Owocki, Joachim Puls
This review describes the evidence for small-scale structure, `clumping', in the radiation line-driven winds of hot, massive stars. In particular, we focus on examining to what ext…
Chandra X-ray spectroscopy of the very early O supergiant HD 93129A: constraints on wind shocks and the mass-loss rate
David H. Cohen, Marc Gagné, Maurice A. Leutenegger +5
We present analysis of both the resolved X-ray emission line profiles and the broadband X-ray spectrum of the O2 If* star HD 93129A, measured with the Chandra HETGS. This star is a…
Mass loss from inhomogeneous hot star winds II. Constraints from a combined optical/UV study
J. O. Sundqvist, J. Puls, A. Feldmeier +1
Mass-loss rates currently in use for hot, massive stars have recently been seriously questioned, mainly because of the effects of wind clumping. We investigate the impact of clumpi…