EC073
Three steep-spectrum High-z quasars
Recently we observed four high-redshift (z>4) blazar candidates with the EVN. Surprisingly, two of them showed misaligned structure with respect to the line of sight, confirmed also by our e-MERLIN observations that showed extended emission (hot spots in lobes). Why these two sources have a blazar-type SED, strong and hard-spectrum X-ray emission in particular, is a puzzle. Whether the observed X-rays can originate from the extended components at high redshifts is not clear. Motivated by the need to increase and complete the sample, we selected 3 more steep-spectrum high-z quasars suitable for imaging with the EVN+e-MERLIN but unobserved so far. We want to obtain mas to 100-mas scale radio structural information and compare them with the known misaligned sources. Comparing X-ray properties with radio structure and investigating the difference in X-ray emission between the high- and low-z sources would provide clues for the X-ray emission mechanism of high-z misaligned radio quasars.
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