Description
Changing Look AGN show a dramatic transition between UV bright and dim states at around 0.01LEdd, and X-ray selected samples of AGN show that this is ubiquitous, not just restricted to rare objects. This behaviour has many similarities with the soft-hard transition in stellar mass black hole binaries, where it is most easily interpreted as the accretion flow making a transition from a thin disc to a radiative inefficient hot flow. The compact radio jet correlates with the X-ray hot flow, and collapses when the hot flow emission drops at the transition. We use stacked VLASS images to explore the radio jet behaviour in AGN across the transition. The radio does not change, but neither does the X-ray hot flow emission as only the thin disc changes at the transition in AGN. The radio/X-ray ratio remains on the 'Fundamental Plane', showing that the radio quiet AGN are consistent with scaling up the same compact radio jet as seen in stellar mass binaries, and that main difference is the persistence of the X-ray hot flow above the transition.
