Unification of BL Lac objects and FR I and FR II(G) radio galaxies, and Doppler factor estimation for BL Lac objects

Abstract In this work, we collected a sample of BL Lacs and FR I II(G) radio galaxies with available core extended emissions from published works to discuss the unified schemes estimate Doppler factor for Lacs. A Wilcoxon rank-sum test Kolmogorov–Smirnov both suggest that probabilities distribution luminosity being same parent are pWRS = 0.779 pK-S 0.326, suggesting they unified. Based on scheme, propose factors Comparing estimated by fitting/regression method those common sources in literature, found good linear correlation sources.