VLBA U, X, C Band Polarimetry of Vir A jet.
Abstract
Very Long Baseline Array U, X and C band polarimetric observations have been made of the inner 100 mas of the bright, radio jet in the nearby active galactic nucleus, Vir A (3C274). The angular resolution of the observations is approximately 1 milliarcsecond corresponding to a linear scale of about 0.08 pc. The jet is substantially limb-brightened along its length. Linear polarization of a few tens of per cent has been detected in some locations along the edges of the jet between 15 and 40 mas from the core. Using observations over widely-separated frequencies in these bands, the Faraday rotation of the plane of polarization is estimated to be approximately 4400 rad m-2. The alignment of the de-rotated, projected, magnetic field vectors are compared with features in the jet. The polarization images are consistent with rotation by a dense Faraday screen. This work is supported by the National Science Foundation.
- Publication:
-
American Astronomical Society Meeting Abstracts
- Pub Date:
- December 2000
- Bibcode:
- 2000AAS...197.7515J