Cosmic ray origin above 10 to the 18th eV - Galactic or extragalactic

Details Cosmic ray origin above 10 to the 18th eV - Galactic or extragalactic Cosmic ray origin above 10 to the 18th eV - Galactic or extragalactic

Sep 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982ap%26ss..86..361d&link_type=abstract

Astrophysics and Space Science, Sept. 1982, vol. 86, p. 361-369.

Astronomy and Astrophysics

Astrophysics

Cosmic Dust, Cosmic Rays, Energetic Particles, Galactic Radiation, Intergalactic Media, Energy Spectra, Galactic Nuclei, Milky Way Galaxy, Radiation Pressure

Scientific paper

An analysis is made of the implications of assuming that suprathermal dust grains (a = 3 x 10 to the 8th cm) of intergalactic origin may acquire cosmic ray energies as high as 10 to the 20th eV. These dust grains may attain 'suprathermal energy' (3 x 10 to the 8th cm/s) by the Fermi process. Initially the dust grains are accelerated by the radiation pressure against the drag of the ambient gas of the medium, but once these dust grains attain a terminal velocity (approximately 100,000 cm/s), then they may be expelled out of the galactic region into the intergalactic medium and finally acquire high energy.

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