Document Type

Conference Proceeding

Publication Date


Published In

High Resolution X-Ray Spectroscopy With XMM-Newton And Chandra: Proceedings


We show how X-ray emission arising within an accelerating, expanding medium that also contains a source of continuum absorption generates line profiles of a characteristic shape. A simple, spherical wind model based on this picture provides good fits to the Chandra HETGS spectrum of the prototypical O star, Zeta Pup. We discuss the model, the fitting procedure and the determination of confidence limits on the model parameters, and our initial results for this star. The derived fit parameters are consistent with a generic wind-shock scenario for Zeta Pup, but there are several surprising aspects of the results, including a lower-than-expected mean wind optical depth and a nearly complete lack of wavelength dependence of the results.


G. Branduardi-Raymont, ed.


Workshop On High-Resolution X-Ray Spectroscopy With XMM-Newton And Chandra

Conference Dates

October 24-25, 2002

Conference Location

Mullard Space Science Laboratory Of University College London, Holmbury St. Mary, Dorking, Surrey, UK