Insights into cosmic-ray acceleration from the study of anomalous cosmic rays

Research output: Contribution to journalArticle

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Abstract

Cosmic rays from many sources and in many locations exhibit similar, inverse-power-law energy spectra, which suggests a common origin for most cosmic rays. Diffusive shock acceleration appears at present to be this common accelerator. Hence, anomalous cosmic rays, thought to be accelerated at the solar-wind termination shock, provide a relatively accessible laboratory for the study of the mechanism of cosmic-ray acceleration. Observations showing a transition from singly-charged anomalous cosmic-ray oxygen to multiply-charged at an energy of some 250 MeV support the picture of acceleration at the quasi-perpendicular termination shock. Such acceleration may be important in other sources, as well. The basic physics of this acceleration process is discussed in some detail.

Original languageEnglish (US)
Pages (from-to)161-178
Number of pages18
JournalSpace Science Reviews
Volume86
Issue number1-4
StatePublished - 1998

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cosmic ray
cosmic rays
shock
solar wind
energy
power law
energy spectra
accelerators
physics
oxygen

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Insights into cosmic-ray acceleration from the study of anomalous cosmic rays. / Jokipii, J. Randy.

In: Space Science Reviews, Vol. 86, No. 1-4, 1998, p. 161-178.

Research output: Contribution to journalArticle

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