New multi-epoch VLBA spectropolarimetry of Centaurus A constrains the subparsec jet inclination to under 25 degrees and finds a conical, constant-speed outflow at the jet base, plus a possible onset of acceleration farther downstream.
Where has all the polarization gone?
1 Pith paper cite this work. Polarity classification is still indexing.
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abstract
We have observed the five radio galaxies NGC1052, NGC4261, Hydra A, Centaurus A and Cygnus A with polarimetric VLBI at 15 GHz to look for possible Faraday rotation in foreground absorbers. Only Cygnus A was found to be polarized at the level of 0.4 %, the other four objects were found to be unpolarized (<0.3 %). We discuss implications for magnetic field structures and physical conditions in the absorbers imposed by the absence of polarized emission at this high frequency.
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The Subparsec-scale Structure and Evolution of Centaurus A. III. A Multi-Epoch Spectral And Polarimetric VLBA Study
New multi-epoch VLBA spectropolarimetry of Centaurus A constrains the subparsec jet inclination to under 25 degrees and finds a conical, constant-speed outflow at the jet base, plus a possible onset of acceleration farther downstream.