Supervisor: Maximilian Stritzinger

Radio-wavelength observations can help us to uncover some of the farthest and oldest objects of our universe. There are multiple huge radio telescopes scattered around the Earth (and some even in orbit) observing independently or in arrays, which can incriaise the resolution to a large extent. In the first half of my talk I introduce the basics of radio interferometry, a method that enables us to connect the independent telescopes into one array with much better resolution. After discussing the observation method itself, I’ll turn my attention to the oldest and most massive objects of the observable universe: the Active Galactic Nuclei (AGNs). I’ll briefly introduce the different types of AGN-s observed, then resolve their differences by showing the modelled structure of one and pointing out the different angles of observation as the main reason behind the differences. Finally, I shall discuss an interesting phenomenon in the seemingly superluminal speed of the ejected material.