Jet power, intrinsic $\gamma$-ray luminosity and accretion in jetted AGN

TL;DR

This study investigates the relationships between jet power, gamma-ray luminosity, and accretion in various jetted AGN, revealing correlations consistent with jet production via the Blandford-Znajek mechanism.

Contribution

It provides a comprehensive analysis of the correlations among jet power, gamma-ray luminosity, and accretion across multiple AGN types, supporting the Blandford-Znajek jet powering model.

Findings

Jet power correlates with gamma-ray luminosity with a slope of ~0.85.

Gamma-ray luminosity correlates with accretion disk luminosity with a slope of ~1.05.

Jet power exceeds accretion disk luminosity in most cases.

Abstract

The correlation between the kinetic jet power $P_{\rm jet}$, intrinsic $\gamma$-ray luminosity ($L^{\rm int}$) and accretion ($L_{\rm disk}$) may reveal the underlying jet physics in various black hole systems. We study the relation between kinetic jet power, intrinsic $\gamma$-ray luminosity, and accretion by using a large sample of jetted AGN, including flat-spectrum radio quasars (FSRQs), BL Lacertae objects (BL Lacs), gamma-ray Narrow-line Seyfert 1 galaxies ($\gamma$NLS1s) and radio galaxies. Our main results are as follows: (1) The slope indices of the relation between $P_{\rm jet}$ and $L^{\rm int}$ are $0.85\pm0.01$ for the whole sample, $0.70\pm0.02$ for the FSRQs, $0.83\pm0.03$ for the BL Lacs, $0.68\pm0.11$ for the $\gamma$NLS1s, and $0.93\pm0.09$ for the radio galaxies, respectively. The jets in $\gamma$NLS1s and radio galaxies almost follow the same $P_{\rm jet}$-$L^{\rm int}$ correlation that was obtained for Fermi blazars. (2) The slope indices of the relation between $L^{\rm int}$ and $L_{\rm disk}$ are $1.05\pm0.02$ for the whole sample, $0.94\pm0.05$ for the FSRQs, $1.14\pm0.05$ for the BL Lacs, and $0.92\pm0.18$ for the $\gamma$NLS1s, respectively. The $\gamma$NLS1s and radio galaxies almost also follow the $L^{\rm int}$-$L_{\rm disk}$ correlation derived for Fermi blazars. (3) The jet power is larger than the luminosity of accretion disks for almost all jetted AGN. Jet power depends on both the Eddington ratio and black hole mass. We obtain $\log P_{\rm jet}\sim(1.00\pm0.02)\log L_{\rm disk}$ for the whole sample, which is consistent with the theoretically predicted coefficient. These results may imply that the jets of jetted AGN are powered by the Blandford-Znajek mechanism.