We use data from large surveys of the local universe (SDSS+Galaxy Zoo) to show
that the galaxy–black hole connection is linked to host morphology at a fundamental level.
The fraction of early-type galaxies with actively growing black holes, and therefore the AGN
duty cycle, declines significantly with increasing black hole mass. Late-type galaxies exhibit the
opposite trend: the fraction of actively growing black holes increases with black hole mass.
We report the discovery of a coherent magnetic spiral structure within the nearby ringed Sab galaxy NGC 4736. High-sensitivity radio polarimetric data obtained with the VLA at 8.46 and 4.86 GHz show a distinct ring of total ...