LX - LUV Relation: Effects of Optical Variability

Optical variability observed in Active Galactic Nuclei (AGNs) is closely related to the properties and dynamics of their accretion disks and X-ray coronae. Stochastic modelling of optical light curves has shown anti-correlations between variability parameters and fundamental physical properties, such as black hole mass, Eddington ratio, and bolometric luminosity, providing insights into the relative size and geometry of the X-ray corona and accretion disk, as well as the reprocessing of X-ray photons. This information holds significant potential, considering that the precise nature of the interaction between the accretion disk and corona, which governs the observed relationship between X-ray and UV luminosities (LX-LUV), remains an open question. To enhance our understanding of the fundamental processes underlying the LX-LUV relation, we analyse various characteristics of optical variability of blue quasars from the Lusso et al. (2020) sample and investigate the correlations between these variability parameters, fundamental AGN properties, and the dispersion of the LX-LUV relation.