Resolving the Radio-loud/Radio-quiet Dichotomy without Thick Disks
Department
Physics
Document Type
Article
Publication Date
5-1-2019
Abstract
Observations of radio loud active galaxies in the XMM-Newton archive by Mehdipour & 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 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 which 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 which 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.
Journal Title
The Astrophysical Journal
Journal ISSN
2041-8213
Volume
876
Issue
L20
Digital Object Identifier (DOI)
10.3847/2041-8213/ab1be3
Comments
Original content from this work may be used under the termsof theCreative Commons Attribution 3.0 licence. Any furtherdistribution of this work must maintain attribution to the author(s)and the titleof the work, journal citation and DOI.1