Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...323..647s&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 323, Dec. 15, 1987, p. 647-656.
Astronomy and Astrophysics
Astronomy
23
Black Holes (Astronomy), Intergalactic Media, Particle Acceleration, Primary Cosmic Rays, Solar Protons, Accretion Disks, Astronomical Models, Neutron Stars, Stellar Winds
Scientific paper
No stochastic mechanism appears capable of the up to 10 to the 20th eV extragalactic acceleration of protons, in light of a consideration which assumes that the primary particles are largely protons. A mechanism based on the Lovelace electric dynamo can furnish the requisite acceleration, if the particles have beamlike trajectories along magnetic field lines and escape from their sources without loss of energy; both conditions are satisfied for acceleration sites in gaseous halos around spiral galaxies in the local supercluster, where the energy for proton acceleration is mass accretion onto massive black holes constituting the nonluminous matter in galaxy halos.
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