Unified scheme for AGN across classes

Establish whether a unified scheme, defined by a limited set of fundamental parameters, can explain the diverse multiwavelength observational phenomena of active galactic nuclei across different classes, including jet formation and accretion states.

Background

The authors contextualize their incidence analysis within broader efforts to unify AGN phenomenology. Historical approaches include orientation-based unified models and evolutionary schemes, as well as scaling relations like the Fundamental Plane of black hole accretion.

Despite progress, a comprehensive, parameter-sparse scheme that accounts for the wide diversity of AGN observational properties remains an explicitly stated open question.