Implications of the continuous radio-loudness distribution among active galactic nuclei in the local Universe

February 27, 2026

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This research aims to explore the distribution of radio loudness among various types of active galactic nuclei.
Analyzed a large, homogeneous sample from the ROGUE I/II catalogue
Calculated bolometric luminosities, accretion rates, and black-hole masses
Divided sample into optically inactive radio galaxies, optically active ones, and radio Seyferts
Examined correlations and distributions of radio loudness across samples
No evidence of bimodality in radio loudness distribution was found
Radio Seyferts showed no correlation compared to OPARGs and OPIRGs which displayed a weak positive trend
A ∼ 2-dex spread in radio luminosity was observed, linked to variations in black-hole spins and magnetic flux

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Investigation reveals a continuous distribution of radio loudness among active galactic nuclei, suggesting shared evolution.

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Wójtowicz et al. (2026) studied this question.

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