Galactic Nuclei as Collapsed Old Quasars

  title={Galactic Nuclei as Collapsed Old Quasars},
  author={Donald Lynden-Bell},
Powerful emissions from the centres of nearby galaxies may represent dead quasars. 
Accretion and the Quasar Phenomenon
Quasars are interpreted as massive black holes in galactic nuclei which are fuelled by capturing gas or stars from their surroundings. This paper discusses the supply of gas, the nature of the inflow
Thermal continuum from accretion disks in quasars
ACCRETION onto black holes in galactic nuclei is a promising power source for quasars1,2, but observational proof has been elusive. I argue here that supermassive accretion in disks may explain the
Black Holes in Galactic Nuclei
The dynamical evidence for black holes (BHs) in galactic nuclei is reviewed, with emphasis on recent improvements in spatial resolution, methods for analyzing galaxy spectra and dynamical modeling.
Active galactic nuclei: Unstable by design
Quasars - the most luminous type of active galactic nuclei in the Universe - may not be active all the time. There is a growing consensus that quasars may have unstable galactic disks and therefore
Supermassive Black Hole Accretion and Feedback
  • A. King
  • Physics
    Black Hole Formation and Growth
  • 2019
I review the physics of accretion on to supermassive black holes in galaxy centres, and how this results in feedback affecting the host galaxy.
Physical Processes in Active Galactic Nuclei
Active Galactic Nuclei (henceforth AGN) have been observed assiduously throughout the electromagnetic spectrum over the past 30 years and we know much about their collective and individual
Recurrent activity in galactic nuclei
Arguments are presented to support the hypothesis that massive galaxies periodically undergo phases of nuclear activity during their evolution at intervals 108–109 yr. The importance of recurrence to
Examining supernova events in Type 1 active galactic nuclei
A statistical study of intermediate Palomar Transient Factory supernovae (SNe) in Type 1 active galactic nuclei (AGNs) has shown a major deficit of supernovae around Type 1 AGN host galaxies, with ...
The legacy and large–scale distribution of active galaxies
  • S. Tremaine
  • Physics
    Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
  • 2005
The evidence that most inactive galaxies contain black holes at their centres is reviewed, and how the local distribution of black holes is related to the population of active galaxies is explained.


On relativistic astrophysics.
Catastrophic implosion analysis in stars with masses greater than critical mass in which general relativity becomes dominant
Messier 87: the Galaxy of Greatest Known Mass
Radio galaxy Messier 87 mass determined using virial theorem for nucleus velocity dispersion
Cosmic X-ray Sources, Galactic and Extragalactic
Instruments carried aboard an Aerobee rocket in April 1965 provided evidence for x-ray emission from the directions of the radio galaxies Cygnus A and M-87 and from the galactic supernova remnant
Highlights of astronomy
Invited Discourses.- Pulsars and their Genesis.- Dark Matter in the Universe.- Venus.- Joint Discussions.- 1. Reference Frames.- Uses and Required Characteristics of Reference Frames for Galactic