Dusty, Radiation Pressure–Dominated Photoionization. II. Multiwavelength Emission Line Diagnostics for Narrow‐Line Regions

Abstract

Seyfert narrow-line region (NLR) emission line ratios are remarkably uniform, displaying only ∼0.5 dex variation between galaxies, and even less within an individual object. Previous photoionization and shock models of this region were unable to explain