Published in MNRAS, 2018
In this paper, we aim to explain observations which indicate a strong relationship between the luminosity of a quasar source and the spatial extent of photoionization in the narrow-line region (NLR). Using a simple physical model of the clouds in the NLR, we are able to produce a theoretical size-luminosity relationship which matches several key features of the observed relationship. This model explains why a tight relationship is observed despite variations in the mass of the clouds, and the number of clouds present. Additionally, we use this population-based approach to study other features of AGN, such as the covering factor of the torus and the total mass of the NLR.
Recommended citation: Dempsey, Ross & Zakamska, Nadia (2018). "The size–luminosity relationship of quasar narrow-line regions" MNRAS. 477 (4), 4615-4626.