Cosmic rays and the boundaries of the heliosphere

Details Cosmic rays and the boundaries of the heliosphere Cosmic rays and the boundaries of the heliosphere

Jun 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995sowi.confq..51c&link_type=abstract

California Inst. of Tech., International Solar Wind 8 Conference, p. 51

Physics

Heliosphere, Solar Wind, Galactic Cosmic Rays, Interstellar Gas, Solar Activity Effects, Neutral Particles, Space Plasmas, Morphology, Boundary Conditions, Ionospheric Drift

Scientific paper

Anomalous cosmic rays (ACRs) are interstellar neutrals that drift into the heliosphere, become singly ionized, and are convected to the termination shock of the solar wind, where they are thought to be accelerated to hundreds of MeV. Because their effective origin is at the termination shock, studies of their gradients and spectral shape can reveal important clues about the shock's location, its strength, and the source flux of ACRs. Recently, such studies have predicted that one or more of the Voyager and Pioneer spacecraft may cross the termination shock in the next few years. In addition, there have been studies of galactic cosmic rays that shed new light on the location of the modulation boundary of these particles, which may be the heliopause region. In this talk, we will review these observations and the information they provide about the boundaries of the heliosphere.

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