The Estimation of Fundamental Physics Parameters for Fermi-LAT Blazars

Aiming to delineate the physical framework of blazars, we present an effective method estimate four important parameters based on idea proposed by \citet{BK95}, including upper limit central black hole mass $M$, Doppler factor $\delta$, distance along axis site $\gamma$-ray production $d$ (which then can be transformed into location $\gamma$-ray-emitting region $R_{\gamma}$) and propagation angle with respect accretion disk $\Phi$. To do so, adopt identical sample 809 {\it Fermi}-LAT-detected blazars which had been compiled in \citet{Pei20PASA}. These derived stepping onto stage may shed new light our knowledge regarding blazars. With regard paper obtain several perspectives, mainly in: (1) putting forward updated demarcation between BL Lacs FSRQs relation broad-line luminosity both measured Eddington units, i.e., $L_{\rm disk}/L_{\rm Edd}=4.68\times10^{-3}$, indicating that there are some differences power disk; (2) proposing is a so-called `appareling zone', potential transition field where changing-look perhaps reside; (3) emission principally constrained outside region, for also away from dusty molecular torus, means importance components jet.