Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979ap%26ss..62..335k&link_type=abstract
Astrophysics and Space Science, vol. 62, no. 2, May 1979, p. 335-345.
Astronomy and Astrophysics
Astrophysics
21
Astronomical Models, Cosmology, Galactic Nuclei, Galactic Structure, Interstellar Magnetic Fields, Chemical Composition, Compton Effect, Magnetization, Models, Quasars, Radio Galaxies, Relativistic Particles, Rotating Disks, Seyfert Galaxies, Synchrotron Radiation
Scientific paper
A rotating supermassive magnetized disk is proposed as a model for all the violent phenomena occurring in the nuclei of galaxies, in the form of quasars, Lacertids, radio galaxies, Seyferts, exploding galaxies, etc. The cold disk feeds a fast-rotating supermassive core (some 1000 Schwarzschild radii in extent), which emits (1) an unsteady thermal wind of filamentary geometry, (2) low-frequency magnetic waves (LFWS), and (3) relativistic electrons and positrons. The latter reach high gamma factors by phase-riding the LFWs, emit synchro-Compton radiation on crossing scattered waves (from gamma-ray energies down to radio frequencies), and are eventually focused into two antipodal relativistic beams by their frozen-in toroidal magnetic field. Torsional oscillations between the core and disk give rise to pulsed injection, and a breathing double-onion shape of the LFW wind zone can explain the superluminal jetlike appearance. A big nuclear explosion ends each duty cycle, but many smaller explosions prevent the settling core from collapsing. In this model, the helium production of galactic centers is comparable to the observed cosmic helium.
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