Radio Jet-Ambient Medium Interactions on Parsec Scales in the Blazar 1055+018

2); (2) Current address: MIT Haystack Observatory); David H. Roberts (1); Joanne M. Attridge (1; John F. C. Wardle (1) ((1) Brandeis University

Radio Jet-Ambient Medium Interactions on Parsec Scales in the Blazar 1055+018

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arxiv astro-ph/9903330 v3 pith:DTWVX7IR submitted 1999-03-22 astro-ph

Joanne M. Attridge (1 , 2) , David H. Roberts (1) , John F. C. Wardle (1) ((1) Brandeis University , (2) Current address: MIT Haystack Observatory) This is my paper · ORCID

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As part of our study of the magnetic fields of AGN we have recently observed a large sample of blazars with the Very Long Baseline Array. Here we report the discovery of a striking two-component jet in the source 1055+018, consisting of an inner spine with a transverse magnetic field, and a fragmentary but distinct boundary layer with a longitudinal magnetic field. The polarization distribution in the spine strongly supports shocked-jet models while that in the boundary layer suggests interaction with the surrounding medium. This behavior suggests a new way to understand the differing polarization properties of strong- and weak-lined blazars.

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