X-ray Emission Line Profile Diagnostics of Hot Star Winds: Constraints on Dynamics, Geometry, and Opacity

Some of the other hot stars observed with Chandra show broad, blushifted, and asymmetric line profiles, similar to those seen in z Pup

But…some hot stars have x-ray spectra with quite narrow lines, that are especially strong and high energy - not consistent with line-force instability wind shocks