Unraveling the Gamma-ray emission in radiogalaxies and their jets

Radio-galaxies are a minority among all extragalactic sources detected in gamma-rays, yet they have excellent potential to study particle acceleration and non-thermal emission in AGN jets.

In contrast with blazars, which have jets aligned with the line-of-sight, radio-galaxies have a smaller Doppler boosting factors. The implications are important: First, the distance at which they are detectable in gamma-rays is smaller. Second, the thermal emission and radiation stemming from comparatively dim extended structures (e.g. the radio cocoon of M87, or the giant radio-lobes of Centaurus A) become visible, with sizes big enough to be tested by current gamma-ray instruments. Last, the smaller distance combined with the tilt of the jet makes it possible to study the jet structure, including possible discontinuities (shocks) which are candidate regions where particle acceleration is thought to take place. In this talk we will discuss projects involving the observation of radio-galaxies and mis-aligned blazars with Cherenkov telescopes, particularly focusing on those carried out by the MAGIC and LST telescopes in La Palma

27/02/2024 - 12:30
Mireia Nievas Rosillo
Instituto de Astrofísica de Canarias, Spain