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

Abstract

We study the $\gamma$-ray luminosity and beaming effect for Fermi blazars. Our results are as follows. (i) There are significant correlations between $\gamma$-ray luminosity and radio core luminosity, and between $\gamma$-ray luminosity and ${\mathrm{R}}_{\mathrm{v}}$, which suggests that the $\gamma$-ray emissions have strong beaming effect. (ii) Using the ${\mathrm{L}}_{\mathrm{ext}}/{\mathrm{M}}_{\mathrm{abs}}$ as an indicator of environment effects, we find that there have no significant correlation between $\gamma$-ray luminosity and ${\mathrm{L}}_{\mathrm{ext}}/{\mathrm{M}}_{\mathrm{abs}}$ 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 $\gamma$-ray emission may be affected by environment on the kiloparsec-scale for BL Lacs.

13pages,6figures,has been accepted for Research in Astronomy andAstrophysics. arXiv admin note: text overlap with arXiv:0903.2043, arXiv:1001.0731 by other authors

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• Radio Core-Dominance of Fermi-Blazars: Implication for Blazar Unification
• On the intrinsic shape of gamma-ray spectrum for Fermi blazars
• On the Evolution of Seyfert galaxies, BL Lacertae objects and Flat-spectrum radio quasars
• On the Unified View of Extragalactic Sources based on their Broadband Emission Properties
• Investigating possible unification of Seyfert galaxies and blazars in Fermi-LAT sample