High redshift radio galaxies (HzRGs) are key objects for studies of the formation and evolution of massive galaxies and super-massive black holes. They are thought to be the progenitors of local massive elliptical galaxies and generally contain large amounts of dust and gas. They are the infrared brightest and the most massive galaxies at their redshifts and host actively-accreting super massive black holes with masses of order 109 M⊙. They are often found to be located at the centre of clusters and proto-clusters of galaxies. Studies of their environment can shed light on the assembly and evolution of the large scale structure in the Universe.
◈ The star formation and environment with the IRAM (Shao et al. 2023 expected).
◈ The mas structure with the EVN (Shao et al. 2023 expected).