Hot, diamagnetic cavities upstream from the earth's bow shock

Details Hot, diamagnetic cavities upstream from the earth's bow shock Hot, diamagnetic cavities upstream from the earth's bow shock

Mar 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jgr....91.2961t&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 91, March 1, 1986, p. 2961-2973.

Physics

81

Bow Waves, Diamagnetism, Earth Magnetosphere, Space Plasmas, Field Strength, International Sun Earth Explorer 1, International Sun Earth Explorer 2, Ion Distribution, Magnetopause, Outgassing

Scientific paper

On eight occasions the ISEE 1 and 2 spacecraft registered peculiar plasma structures upstream of the earth's bow shock. The events exhibit a temporary, strong reduction in the magnitude of the magnetic field and strong enhancements of the field strength bordering the reduction zone. The low field strength regions featured temperatures from 1-10 million k and pressure an order of magnitude greater than the solar wind. The pressure gradients exceeded the magnetic tension around the structures, although the field of the cavities may be a closed structure. A model is proposed of hot, expanding diamagnetic plasma cavities with scales on the order of a few earth radii. Speculations on the interaction and origin or impetus for the cavities within the bow shock, foreshock, the magnetosphere and the solar wind are discussed. Similarities between the phenomena detected and signatures obtained with the AMPTE releases of chemicals in the solar wind are noted.

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