Dice Question Streamline Icon: https://streamlinehq.com

Mass-invariance of radio AGN incidence versus mass-normalised jet power

Determine whether the fraction of galaxies hosting radio-loud active galactic nuclei (radio AGN) exhibits a mass-invariant dependence on the mass-normalised jet power (λ_Jet = Q/L_Edd), analogous to the mass-invariant Eddington-ratio dependence observed for X-ray selected AGN, across accretion modes and for different radio morphologies and host galaxy types.

Information Square Streamline Icon: https://streamlinehq.com

Background

Past incidence studies of X-ray selected AGN report a mass-invariant Eddington-ratio distribution, suggesting that triggering and fueling mechanisms are independent of host stellar mass. Whether a comparable mass-invariant relation exists for jet power in radio AGN remains unresolved, particularly when considering different accretion states and radio morphologies.

This paper uses LOFAR and eROSITA data with GAMA09 spectroscopy to measure incidences of radio and X-ray AGN and introduces λ_Jet as a mass-scaled kinetic power indicator. The authors explicitly flag the uncertainty about mass invariance for radio AGN.

References

However, it remains unknown whether a similar mass-invariant relation can be found for radio AGN as a function of mass-normalised jet power in a given accretion mode, especially for different radio morphologies or host galaxy types.

— The LOFAR-eFEDS survey: The incidence of radio and X-ray AGN and the disk-jet connection (2402.16943 - Igo et al., 26 Feb 2024) in Section 1 (Introduction)