LeMMINGs V. Nuclear activity and bulge properties

We additionally implement a Monte Carlo method to determine errors on bulge, disc and other fitted structural parameters. Moving (in the opposite direction) across the Hubble sequence, i.e., from the irregular to elliptical galaxies, we confirm that bulges become larger, more prominent and round. Such bulge dominance is associated with a brighter radio core luminosity.

We also find that the radio detection fraction increases with bulge mass. At M_*,bulge_>=10^11^M_{sun}_, the radio detection fraction is 77%, declining to 24% for M_*,bulge_<10^10^M_{sun}_. Furthermore, we observe core-Sersic bulges tend to be systematically round and to possess high radio core luminosities and boxy-distorted or pure elliptical isophotes.

However, there is no evidence for the previously alleged strong tendency of galaxies' central structures (i.e., a sharp Sersic/core-Sersic dichotomy) with their radio loudness, isophote shape and flattening.