The \gamma-ray loud blazars (flat spectrum radio quasars--FSRQs and BL Lacertae objects-BLs) are very bright in the \gamma-ray bands, which is perhaps associated with a beaming effect. Therefore, one can expect that the \gamma-ray luminosity is correlated with the beaming factor. In this paper, we investigated the relation between the radio Doppler factors and the gamma-ray luminosities. Our analysis suggests that the \gamma-ray luminosity be strongly correlated with the factor of \delta_R for the whole sample, FSRQs, and BLs. When the effect of a common redshift is excluded, the correlation still exists for the FSRQs sub-sample suggesting that the \gamma-rays are strongly beamed. However, the partial correlation analysis does not show a correlation for the small BL Lac sample.
@article{arxiv.1210.4096,
title = {Beaming Effect in Fermi Blazars},
author = {J. H. Fan and J. H. Yang and J. Y. Zhang and T. X. Hua and Y. Liu and Y. P. Qin and Y. Huang},
journal= {arXiv preprint arXiv:1210.4096},
year = {2015}
}