Resolving the Radio-loud/Radio-quiet Dichotomy without Thick Disks

Observations of radio-loud active galaxies in the XMM-Newton archive by Mehdipour and Costantini show a strong anti-correlation between the column density of the ionized wind and the radio-loudness parameter, providing evidence that jets may thrive in thin disks. This is in contrast with decades of analytic and numerical work suggesting that jet formation is contingent on the presence of an inner, geometrically thick disk structure, which serves to both collimate and accelerate the jet. Thick disks emerge in radiatively inefficient disks that are associated with sub-Eddington as well as super-Eddington accretion regimes, yet we show that the inverse correlation between winds and jets survives where it should not; namely, in a luminosity regime normally attributed to radio-quiet active galaxies that are modeled with thin disks. This, along with other lines of evidence, argues against thick disks as the foundation behind the radio-loud/radio-quiet dichotomy, opening up the possibility that jetted versus non-jetted black holes may be understood within the context of radiatively efficient thin disk accretion.