Studying magnetic fields in several parsec-scale AGN jets using Faraday Rotation

Details Studying magnetic fields in several parsec-scale AGN jets using Faraday Rotation Studying magnetic fields in several parsec-scale AGN jets using Faraday Rotation

2011-02-03

arxiv.org/abs/1102.0702v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

From the proceedings of the 10th European VLBI Network Symposium and EVN Users Meeting: VLBI and the new generation of radio a

Scientific paper

We present multi-frequency radio observations from the Very Long Baseline Array (VLBA) of selected AGN that seem to have a B-field structure with a central "spine" of B-field orthogonal to the jet and a longitudinal B-field near one or both edges of the jet. Two explanations for this structure have been discussed in the literature: shocks making the central orthogonal field combined with a jet-medium interaction causing the longitudinal "sheath", or both components produced by a helical jet magnetic field. One way to investigate this structure is to look for gradients in the Faraday Rotation across the jet. We will discuss results for 0333+321, 1150+812 and 2037+511 providing evidence for the latter picture.

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