Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...213..827h&link_type=abstract
Astrophysical Journal, Part 1, vol. 213, May 1, 1977, p. 827-830.
Astronomy and Astrophysics
Astrophysics
3
Acceleration (Physics), Black Holes (Astronomy), Stellar Mass Accretion, Stellar Radiation, Supermassive Stars, Astrophysics, Galactic Nuclei, Hypersonic Speed, Radio Sources (Astronomy), Relativity, Stellar Rotation
Scientific paper
It is suggested that many supermassive compact objects may be accelerated to velocities of the order of 0.01 c by their asymmetric emission of radiation. Two scenarios are considered: the acceleration of off-axis magnetic-dipole spinars by emission of asymmetric low-frequency radiation and the acceleration of supermassive black holes by emission arising from asymmetric accretion. For the black holes, cases of cone accretion, column accretion, acceleration out of a galaxy, and oscillation in the potential well of a galactic nucleus are analyzed. The results show that black holes must attain at least 100 million solar masses before acceleration to hypersonic velocities if the rotation velocity and temperature of the accreting gas are 100 km/s and 10,000 K, that high-specific-angular-momentum spinars and supermassive black holes tend to escape singly from galactic nuclei in directions parallel to the spin axes of the galaxies, and that accelerated spinars and supermassive black holes could explain single- or multiple-component radio sources but not the predominance of symmetrical two-component sources.
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