LBA observations for project V619 semester 2022OCTS

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We propose observations of two newly-discovered radio-loud quasi-stellar objects (QSOs) at the highest redshifts currently explored (z>6; where only five other similar objects are known). These sources are the first two confirmed high-z radio-loud QSOs out of a larger sample of candidates selected with the recent RACS radio survey. This sample will represent the ideal laboratory to study relativistic jets and their impact on supermassive black hole evolution in the primordial Universe, at the end of the epoch of re-ionisation. The primary aim of the observations is to uncover the structure and the emission of these relativistic jets at scales of a few parsecs in order to constrain their physical parameters (e.g. size, orientation, magnetic field). To this end we propose LBA observations in the 13-cm and 3-cm bands with all the antennas available.