Speaker
Description
"In this talk, I will present results for 2,001 radio AGNs from the ROGUE I catalog (Kozieł-Wierzbowska et al. 2020), including Fanaroff-Riley type I, II, and hybrid I/II systems, as well as double-double, X-shaped, Z-shaped, wide-angle tail, narrow-angle tail, and head-tail radio galaxies. The sources span angular sizes from 5″ to 1,100″, corresponding to projected linear sizes of 10 kpc–2 Mpc over the redshift range 0.01 < z < 0.54. Approximately 10% of the sample are compact radio sources (<60 kpc), while about 3% are giant radio galaxies (>700 kpc). Roughly 34% are associated with galaxy clusters, and 16% exhibit significant arm-length asymmetries with ratios greater than 2.
We find that cluster association fractions are broadly similar across FR I, FR II, and FR I/II morphological classes. Arm-length asymmetries occur at comparable rates in FR I and FR I/II sources, but are two to four times less common in FR IIs, consistent with the idea that FR II jets are more stable, highly collimated, and less susceptible to disruption by dense intra-cluster environments. In contrast, bent radio galaxies, including wide-angle and narrow-angle tail systems, display lobe asymmetries nearly four times less frequently than cluster-associated sources, suggesting that local intra-cluster medium conditions smooth out large-scale asymmetries.
The mean galaxy number densities around FR I, FR II, FR I/II, wide-angle tail, narrow-angle tail, and head-tail sources are comparable, supporting the view that local intra-cluster medium properties play the dominant role in shaping bent radio morphologies. Finally, radio power-linear size evolutionary tracks indicate that the FR II population is dominated by AGNs with jet kinetic powers below 10³⁸ erg s⁻¹ and includes both young (<10 Myr) and evolved (>100 Myr) radio galaxies."