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A spatially confined long-lived stream of solar particles

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Abstract

The intensities of low-energy solar-interplanetary electrons and ions at 1 AU occasionally change in a ‘square-wave’ fashion. The changes may be increases or decreases and they have duration of a few hours. In one such example following a solar flare, particles flow away from the Sun in a well-defined channel 2.5 × 106 km in width for twenty hours or longer. We believe that the interplanetary magnetic lines defined by this channel connect to an active region at 16° N solar latitude. At this time the Earth was located at a solar latitude of 2° S. Evidently the particle channel connects to a region of the solar atmosphere which supplies particles over these long times either via storage of the flare accelerated particles or else by continuous acceleration. Arguments are given against the latter possibility. We discuss a model for coronal storage which is consistent with the observations.

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Authors and Affiliations

  1. Space Sciences Laboratory, University of California, 94720, Berkeley, CA, U.S.A.

    K. A. Anderson & W. M. Dougherty

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  1. K. A. Anderson
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  2. W. M. Dougherty
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Also Physics Department.

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Anderson, K.A., Dougherty, W.M. A spatially confined long-lived stream of solar particles. Sol Phys 103, 165–175 (1986). https://doi.org/10.1007/BF00154866

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  • DOI: https://doi.org/10.1007/BF00154866

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