EZ028
EVN 22 GHz polarimetry observation of 3 high-z quasars
Magnetic fields are believed to play an important role in formation and collimation of AGN jets, but many details of the physical processes are still largely unknown. Our knowledge of the polarization properties of the extremely high redshift quasars is even poor. We propose a pilot experiment to observe a sample of three high-redshift (z>4) radio-loud AGNs with full polarization mode and with full EVN at 22 GHz to explore the magnetic field properties in the most distant Universe. The polarization properties of all these sources have not been observed at 22 GHz before. For an object at z > 4, the observing frequency of 22 GHz corresponds to a rest frame frequency of > 110 GHz, allowing for acquiring equivalent millimeter-wavelength VLBI information compared to low-redshift ones, and the 22 GHz polarimetry is technically easier than 43/86GHz. We request 13.5 h in total, 4h on each target source, 2 Gbps data rate, resulting in a sensitivity of 0.015 mJy/beam.
Observation pages at the EVN archive:
This data is part of the archive of VLBI data maintained by JIVE on behalf of the EVN, a network of radio telescopes located primarily in Europe and Asia, with additional antennas in South Africa. The EVN archive itself has the DOI https://doi.org/10.17616/R3Z197