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Paper: The Plasma Structure in the Vicinity of the Jet of SS 433
Volume: 362, The Seventh Pacific Rim Conference on Stellar Astrophysics
Page: 121
Authors: Kubota, K.; Kawai, N.; Kotani, T.; Ueda, Y.; Brinkmann, W.
Abstract: We analyzed the X-ray spectra of SS433 in the 510 keV band observed with the pn camera of the European Photon Imaging Camera (EPIC) onboard XMM-Newton in four epochs, 2003 April 4, April 8, October 18, and October 25. We detected an iron K-shell absorption edge feature at E≅7.9 keV (in three epochs) or E≅7.6 keV (in one epoch). The continuum spectrum can be well reproduced with a partial covering model, where the absorber covers most of the X-ray jet with a column density of NH ≅ 1024 cm−2. The observed edge energies are consistently explained in all the epochs if the absorbing matter is cold and is moving along the blue-shifted jet with the same velocity. We discuss the geometry of the jet structure based on these results.
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