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Resolving the Radio Emission from a 𝑧=7 Quasar

Presentation #341.11 in the session AGN and Quasars.

Published onJul 01, 2023
Resolving the Radio Emission from a 𝑧=7 Quasar

To date, numerous quasars have been discovered at z ~ 6 and up to z ~ 7.6. These high-z quasars represent the first Supermassive Black Holes (SMBHs) and galaxies seen close to the end of cosmic reionization, the edge of the β€œdark ages”, providing a unique tool to investigate the nuclear activity in galaxies at the earlier stages of cosmic evolution. Furthermore, powerful radio-jets are thought to play a key role in the formation and growth of SMBHs, allowing super-Eddington accretion rates. However, currently there is a dearth of radio sources at z β‰₯ 7. Here, we briefly outline the discovery of the most distant radio-loud quasar known-to-date at z=7.0, and present multi-frequency milliarcsecond resolution (10s of pc) imaging and analysis of the radio emission from this source obtained with the Very Long Baseline Array (VLBA).

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