Speaker
Description
A key component of AGN feedback is the injection of kinetic energy from radio jets. However, there’s a fundamental lack of understanding of why quasars, otherwise very similar, have such a wide range of radio jet powers and, therefore, the impact of AGN jets. Using large samples from LoTSS DR2 coupled with a Bayesian parametric model, we can separate and quantify the jet and host galaxy contributions to quasar radio emission. We demonstrate that the traditional radio-loud/quiet quasar classification fails to reflect the physical origin of radio emissions. Instead, our model allows for redefining radio AGN populations based on physical processes, which enables us to robustly measure the evolution of quasar jet power with environmental factors on large and small scales. We discovered a positive correlation between quasar jet power and angular clustering, suggesting a coevolution between jet production and halo mass. Quasars dominated by jet activities are 10 times more clustered than those without strong jets. Quasars with more massive black holes are also more clustered, albeit with a weaker signal, implying that accretion mode differences are less critical in the production of strong jets. Finally, we will present results from the first joint LOFAR-Euclid study on the role of galaxy mergers in triggering quasar radio jets. This not only reveals the role of small-scale environment in jet production but also showcases the potential of future Euclid-SKA synergetic studies, thanks to their exquisite spatial resolution and surface brightness sensitivity.
