Counter-rotating black holes from FRII lifetimes
Department
Physics
Document Type
Article
Publication Date
1-1-2023
Abstract
Estimates suggest that while FRII jets appear to have lifetimes constrained to hundreds of millions of years, radio galaxies with FRI jets appear to be longer lived. We illustrate the nature of this time constraint from model perspectives, showing how compatibility between theory and data match in a way suggesting a key difference between active galaxies whose engines are characterized by accretion onto co-rotating versus counter-rotating black holes. We calculate a range of timescales for counter-rotating black holes for a range of accretion rates compatible with theory which we then compare to data. The validity of these timescales constitutes the most powerful recent piece of evidence for considering counter-rotation between black holes and accretion disks in high energy astrophysics.
Journal Title
Frontiers in Astronomy and Space Sciences
Journal ISSN
2296-987X
Volume
10
Digital Object Identifier (DOI)
10.3389/fspas.2023.1123209