Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.228..843d&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 228, Oct. 15, 1987, p. 843-868.
Astronomy and Astrophysics
Astronomy
25
Electromagnetic Fields, Molecular Clouds, Particle Acceleration, Particle Motion, Galactic Cosmic Rays, Kinetic Equations, Positrons, Radiation Distribution, Stochastic Processes
Scientific paper
Equations of particle motion are derived for weakly ionized turbulent plasma containing a magnetic field. In this case particle energies change due to fluctuating electromagnetic fields. Particle motion in coordinate and momentum space is shown to be described by the diffusion approximation. The solutions of these equations are obtained for both magnetized and unmagnetized particles. Magnetized particles are shown to be effectively accelerated under certain conditions. The distribution functions have been calculated for the conditions of galactic giant molecular clouds. It is found that the cosmic ray density may be higher inside clouds than in the intercloud medium. The possible influence of this process on gamma-emissivity of the Galaxy, on the chemical composition of cosmic rays, on the flux of galactic antiprotons and positrons and on the galactic radio emission is discussed.
Dogiel Vladimir A.
Gurevich Aleksander V.
Istomin Ia. N.
Zybin Kirill P.
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