2003/09/15 by E. Middelberg, A. L. Roy, Middelberg, E. +7
Physics and Astronomy · #Astrophysics (astro-ph) #FOS: Physical sciences #Radio Astronomy Observations and Technology #Solar and Space Plasma Dynamics #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0309385
To be published in "Future Directions in High Resolution Astronomy" (Celebration of the 10th Anniversary of the Very Long Baseline Array), ASP Conference Series, 7 pages, 1 figure, needs newpasp.sty
arxiv created 2003/09/15 · openalex publication_date 2003/09/15 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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.