Heavy element compositions and energy spectra of galactic and solar cosmic rays

Details Heavy element compositions and energy spectra of galactic and solar cosmic rays Heavy element compositions and energy spectra of galactic and solar cosmic rays

Apr 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987spet.rept..331e&link_type=abstract

In CNES, Space Environment Technology p 331-351 (SEE N88-11702 03-18)

Astronomy and Astrophysics

Astrophysics

Chemical Composition, Energy Spectra, Galactic Cosmic Rays, Heavy Elements, Primary Cosmic Rays, Abundance, Astrophysics, Interstellar Chemistry, Interstellar Matter, Solar Activity, Solar Cycles, Solar Protons

Scientific paper

The two components in the proton and heavy nuclei cosmic ray records: the galactic component, solar modulated in accordance with the 11 yr cycle; and the solar component, consisting of bursts of particles spread in interplanetary medium and occurring at random, but preferentially during the period of solar maximum, are discussed. Comparison of observed abundances of galactic cosmic rays and local galactic matter suggests that these sources originate in the high atmosphere of solar-like stars, spread throughout the Galaxy. As regard the solar proton events, observed abundances vary from one event to another. It is however possible to draw a basic composition, which, while different from local galactic and solar photospheric composition, is very similar to that observed in the solar corona and in galactic cosmic rays. Solar events were parameterized to evaluate their effects. There are typical spectra for the ordinary and anomalously large events, and there is a mean case and worst case composition of a typical event.

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