Mathematics – Probability
Scientific paper
Apr 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...229..424l&link_type=abstract
Astrophysical Journal, Part 1, vol. 229, Apr. 1, 1979, p. 424-431.
Mathematics
Probability
17
Galactic Radiation, Galactic Structure, Primary Cosmic Rays, Probability Density Functions, Radiation Sources, Statistical Analysis, Boundary Value Problems, Density Distribution, Power Spectra, Probability Distribution Functions, Secondary Cosmic Rays, Supernovae
Scientific paper
Assuming that the sources of primary cosmic radiation are discrete and distributed at random but according to a given probability distribution throughout the Galaxy, statistical quantities of interest (e.g., means, variances, and two-point correlations) are calculated analytically for the density, flux (anisotropy), and age distribution of both secondaries and primaries in terms of a Green's function describing galactic propagation from a monoenergetic discrete source. Also presented is the probability distribution for the density of primary cosmic rays at a given position when the spacetime source volume and number of sources increase without limit. For illustrative purposes, detailed results are presented for one species of primary and secondary nuclei within a version of the standard 'leaky box' propagation model assuming supernova sources. The importance of the theory lies in its unification of all models of galactic cosmic ray propagation involving discrete sources within a single framework.
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