EL062
e-EVN: EP125A, EL062A
The radio observations of z~6 quasars are important to understand the activity of the first supermassive black holes (SMBHs) at a very early evolutionary stage. However, radio-weak sources, including radio-quiet and radio-intermediate quasars with radio loudness R<100, are extremely hard due to the limit of sensitivity. We propose deep EVN+e-MERLIN observations of two radio-weak sources with similar radio flux densities of 100~200 microJy, CFHQS J2242+0334 and SDSS J0100+2802 at z~6, with a radio loudness parameter of 55 and 0.6, respectively. The high-resolution imaging will provide chances to explore the features of the early and less powerful radio activities of the quasars in the early Universe. We expect to confirm the emergence of weak jet and radio variability through VLBI in such distant and radio-weak quasars for the first time, suggesting that AGN still plays major a role in the less powerful radio activity.
Observation pages at the EVN archive:
Context for this dataThis 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