Doppler factor estimation for 350 Fermi blazars

In total, we collected a sample of 350 blazars with broad-line emissions including 50 new objects and 300 blazars from published works to revisit the correlation between the {gamma}-ray luminosity and the broad-line luminosity, and proposed a new method to estimate the Doppler factors based on the correlation between the radiative power of the jet and luminosity of the BLR.

We come to following conclusions. (1) For the 50 Fermi blazars, their broad-line luminosity (log LBLR) ranges from 41.82-45.2erg/s with a mean value of 44.39erg/s. (2) The Doppler factor ({delta}) ranges from {delta}=0.35 to {delta}=85.66 with a mean value of 12.54, which is consistent with the results in the literature.