Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apj...201..526o&link_type=abstract
Astrophysical Journal, vol. 201, Oct. 15, 1975, pt. 1, p. 526-531.
Astronomy and Astrophysics
Astrophysics
3
Astronomical Models, Galactic Nuclei, Nonthermal Radiation, Quasars, Seyfert Galaxies, Synchrotron Radiation, Gravitational Collapse, Pulsars, Stellar Magnetic Fields, Stellar Mass, Stellar Rotation
Scientific paper
The supermassive-star model for the origin of the nonthermal luminosity of quasars and nuclei of Seyfert galaxies is analyzed. In the general model, a moving magnetic field is the accelerating mechanism for ultrarelativistic particles and gravitational collapse is the energy source. Several specific models are considered for the magnetic field, including a frozen-in field that is twisted about the axis of a rotating supermassive star, a tightly wound magnetic spiral, and the rotating field of a giant pulsar. In the general model, an accelerating efficiency close to unity is assumed. However, it is found that observational and theoretical evidence indicate an accelerating efficiency of less than 0.01 for the specific magnetic-field models. Mass-loss rates of quasars and Seyfert nuclei are calculated on the basis of the lower efficiency value and found to be reasonable.
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