Measuring the jet power of flat spectrum radio quasars

TL;DR

This paper introduces a method to estimate the kinetic power of AGN jets using frequency-dependent core position shifts, revealing a correlation with narrow-line luminosity and applicable to weak, high-redshift jets.

Contribution

The study presents a novel technique for measuring jet power in flat spectrum radio quasars based on core shift observations, extending applicability to faint and distant jets.

Findings

Jet power correlates with narrow-line luminosity.

Method applicable to weak and high-redshift jets.

Consistent with known relations for radio galaxies.

Abstract

We use frequency-dependent position shifts of flat spectrum radio cores to estimate the kinetic power of AGN jets. We find a correlation between the derived jet powers and AGN narrow-line luminosity, consistent with the well-known relation for radio galaxies and steep spectrum quasars. This technique can be applied to intrinsically weak jets even at high redshift.