Radio-Optical-Gamma-Ray properties of MOJAVE AGN detected by Fermi/LAT

TL;DR

This study analyzes the multi-band emission properties of MOJAVE AGN detected by Fermi/LAT, revealing significant correlations between gamma-ray, optical, and radio luminosities, and modeling these relations with a leptonic jet framework.

Contribution

It provides new insights into the correlations between multi-band emissions of blazars and models these relations considering jet and accretion disk parameters.

Findings

Significant correlation between gamma-ray and optical luminosities.

Positive correlation between gamma-ray luminosity and radio-optical loudness.

Variations in jet and accretion parameters can reproduce observed emission trends.

Abstract

Aims. We use a sample of 83 core-dominated active galactic nuclei (AGN) selected from the MOJAVE (Monitoring of Jets in AGN with VLBA Experiments) radio-flux-limited sample and detected with the Fermi Large Area Telescope (LAT) to study the relations between non-simultaneous radio, optical, and gamma-ray measurements. Methods. We perform a multi-band statistical analysis to investigate the relations between the emissions in different bands and reproduce these relations by modeling of the spectral energy distributions of blazars. Results. There is a significant correlation between the gamma-ray luminosity and the optical nuclear and radio (15 GHz) luminosities of blazars. We report a well defined positive correlation between the gamma-ray luminosity and the radio-optical loudness for quasars and BL Lacertae type objects (BL Lacs). A strong positive correlation is found between the radio luminosity and the gamma-ray-optical loudness for quasars, while a negative correlation between the optical luminosity and the gamma-ray-radio loudness is present for BL Lacs. Modeling of these correlations with a simple leptonic jet model for blazars indicates that variations of the accretion disk luminosity (and hence the jet power) is able to reproduce the trends observed in most of the correlations. To reproduce all observed correlations, variations of several parameters, such as the accretion power, jet viewing angle, Lorentz factor, and magnetic field of the jet, are required.