Transport and propagation of cosmic rays in galaxies. II - The effect of a galactic wind on the mean lifetime and age distribution of non-decaying cosmic rays

Details Transport and propagation of cosmic rays in galaxies. II - The effect of a galactic wind on the mean lifetime and age distribution of non-decaying cosmic rays Transport and propagation of cosmic rays in galaxies. II - The effect of a galactic wind on the mean lifetime and age distribution of non-decaying cosmic rays

Dec 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...116...10l&link_type=abstract

Astronomy and Astrophysics, vol. 116, no. 1, Dec. 1982, p. 10-26.

Astronomy and Astrophysics

Astrophysics

8

Charged Particles, Cosmic Rays, Diffusion Coefficient, Galactic Radiation, Particle Trajectories, Adiabatic Conditions, Nucleons, Point Sources, Time Dependence, Transport Properties

Scientific paper

Exact analytical solutions for the mean age and age distribution of non-decaying charged particles in a dynamical halo are presented. The particles are subject to diffusion, convection, adiabatic deceleration, momentum toss and/or acceleration processes after their injection from sources. The galactic wind velocity is assumed to be zero in the galactic plane and to increase with galactic height. The solutions allow for any source distribution with respect to position and momentum and any momentum dependence of the diffusion coefficient and the momentum loss or acceleration term. Resulting age distributions are always Gaussian and in most cases decrease at small ages.
The basic physical effects are illustrated in the case of mono-momentum injection at a point source of cosmic ray protons and electrons.

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