The Radio to Gamma Ray Connection of EGRET Blazars: Correlation, Regression and Monte Carlo Analysis

Abstract

A comprehensive statistical analysis of the broadband properties of EGRET blazars is presented. This analysis includes sources identified as blazars in the Sowards-Emmerd publications. Using this sample of 122 sources, we find that there is a relationship $L_{\gamma }\propto {L_r}^{0.77\pm 0.03}$ as well as a correlation between ${\alpha }_{og}$ and ${\alpha }_{ro}$, and a correlation between radio luminosity and ${\alpha }_{og}$. Through the use of Monte Carlo simulations, we can replicate the observed luminosity relationship if a synchrotron self-Compton model is assumed. However, this relationship can not be replicated if an external Compton scattering model is assumed. These differences are primarily due to beaming effects. In addition it has been determined that the intrinsic radio luminosity of the parent sample falls in the range $10^{21}<L<10^{30}\mathrm{WattsH}{\mathrm{z}}^{-1}$ and that the bulk Lorentz factors of the source are in the range $1<\Gamma <30$, in a agreement with VLBI observations. Finally, we discuss implications for GLAST, successfully launched in June 2008.

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Cited by in corpus (12)

• MOJAVE. XVII. Jet Kinematics and Parent Population Properties of Relativistically Beamed Radio-Loud Blazars
• The radio/gamma-ray connection in Fermi-blazars
• Contemporaneous VLBA 5 GHz Observations of LAT-Detected Blazars
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• Correlation between Fermi/LAT gamma-ray and 37 GHz radio properties of northern AGN averaged over 11 months
• Absorption of 10 Gev--1 Tev Gamma Rays from 3C 279
• Radio and Gamma-ray Properties of Extragalactic Jets from the TANAMI Sample
• The $\gamma$-ray sky seen at X-ray energies I. Searching for the connection between X-rays and $\gamma$-rays in Fermi BL Lac objects
• Locating positions of γ-ray--emitting regions in blazars
• The generation of connected high and very high energy $\gamma$-rays and radio emission in active galactic nuclei