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Paper: A New Method to Detect Faraday Screen
Volume: 386, Extragalactic Jets: Theory and Observation from Radio to Gamma Ray
Page: 459
Authors: Inoue, M.; Asada, K.; Nagai, H.
Abstract: We point out a possible method to investigate a plasma sheath, or Faraday screen, which has been revealed by recent Faraday rotation studies of AGN jets. When a jet is spiral in shape, it may happen to go across a jet trajectory behind the front jet. The plasma sheath around the front jet can be seen as an absorption feature against the jet behind the front jet. This configuration should not be a special case when the jet trajectory is spiral in shape, and the point overlapping the jet with each other provides opportunity to investigate the plasma sheath. However, it might be difficult if the sheath is thin, and high angular resolution observations are required. VSOP observation shows a sharp absorption feature to suggest free-free absorption by the plasma sheath, which demonstrates a reality to study the sheath.
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