The beaming effect and $\rm{\gamma}$-ray emission for Fermi blazars

TL;DR

This study investigates the beaming effect and gamma-ray emission in Fermi blazars, revealing strong correlations with radio luminosity and environment effects, especially in BL Lac objects, highlighting the role of beaming and environment in gamma-ray emission.

Contribution

The paper provides new insights into the beaming effect and environmental influences on gamma-ray luminosity in Fermi blazars, with specific focus on differences between FSRQs and BL Lacs.

Findings

Significant correlation between gamma-ray and radio core luminosity.

Gamma-ray luminosity correlates with Rv, indicating beaming effects.

Environmental effects influence gamma-ray emission in BL Lacs.

Abstract

We study the $\rm{\gamma}$-ray luminosity and beaming effect for Fermi blazars. Our results are as follows. (i) There are significant correlations between $\rm{\gamma}$-ray luminosity and radio core luminosity, and between $\rm{\gamma}$-ray luminosity and $\rm{R_{v}}$, which suggests that the $\rm{\gamma}$-ray emissions have strong beaming effect. (ii) Using the $\rm{L_{ext}/M_{abs}}$ as an indicator of environment effects, we find that there have no significant correlation between $\rm{\gamma}$-ray luminosity and $\rm{L_{ext}/M_{abs}}$ for all sources when remove the effect of redshift. FSRQs considered alone also do not show a significant correlation, while BL Lacs still show a significant correlation when remove the effect of redshift. These results suggest that the $\rm{\gamma}$-ray emission may be affected by environment on the kiloparsec-scale for BL Lacs.