Plasma properties of driver gas following interplanetary shocks observed by ISEE-3

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Plasma fluid parameters calculated from solar wind and magnetic field data obtained on ISEE 3 were studied to determine the characteristic properties of driver gas following interplanetary shocks. Of 54 shocks observed from August 1978 to February 1980, 9 contained a well defined driver gas that was clearly identifiable by a discontinuous decrease in the average proton temperature across a tangential discontinuity. While helium enhancements were present in all of 9 of these events, only about half of them contained simultaneous changes in the two quantities. Often the He/H ratio changed over a period of minutes. Simultaneous with the drop … continued below

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14 pages

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Zwickl, R. D.; Asbridge, J. R.; Bame, S. J.; Feldman, W. C.; Gosling, J. T. & Smith, E. J. January 1, 1982.

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Plasma fluid parameters calculated from solar wind and magnetic field data obtained on ISEE 3 were studied to determine the characteristic properties of driver gas following interplanetary shocks. Of 54 shocks observed from August 1978 to February 1980, 9 contained a well defined driver gas that was clearly identifiable by a discontinuous decrease in the average proton temperature across a tangential discontinuity. While helium enhancements were present in all of 9 of these events, only about half of them contained simultaneous changes in the two quantities. Often the He/H ratio changed over a period of minutes. Simultaneous with the drop in proton temperature the helium and electron temperature decreased abruptly. In some cases the proton temperature depression was accompanied by a moderate increase in magnetic field magnitude with an unusually low variance and by an increase in the ratio of parallel to perpendicular temperature. The drive gas usually displayed a bi-directional flow of suprathermal solar wind electrons at higher energies (>137 eV).

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14 pages

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NTIS, PC A02/MF A01.

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  • 5. solar wind conference, Woodstock, VT, USA, 1 Nov 1982

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  • Other: DE83007547
  • Report No.: LA-UR-83-348
  • Report No.: CONF-821159-4
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 6423826
  • Archival Resource Key: ark:/67531/metadc1208195

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  • January 1, 1982

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Zwickl, R. D.; Asbridge, J. R.; Bame, S. J.; Feldman, W. C.; Gosling, J. T. & Smith, E. J. Plasma properties of driver gas following interplanetary shocks observed by ISEE-3, article, January 1, 1982; New Mexico. (https://digital.library.unt.edu/ark:/67531/metadc1208195/: accessed June 8, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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