The compact radio structure of the high-redshift blazar J1430+4204 before and after a major outburst

TL;DR

This study examines the structural changes in the high-redshift blazar J1430+4204 before and after a major radio outburst using VLBA imaging, revealing insights into its physical properties.

Contribution

It provides the first detailed analysis of the blazar's radio structure changes associated with a significant outburst at high redshift.

Findings

Detected structural changes post-outburst

Estimated physical parameters of the jet

Enhanced understanding of high-redshift blazar behavior

Abstract

The high-redshift (z=4.72) blazar J1430+4204 produced an exceptional radio outburst in 2006. We analyzed 15-GHz radio interferometric images obtained with the Very Long Baseline Array (VLBA) before and after the outburst, to search for possible structural changes on milli-arcsecond angular scales and to determine physical parameters of the source.