Hydromagnetic Observations in the Solar Wind

  • K. W. Ogilvie
  • L. F. Burlaga
Part of the Astrophysics and Space Science Library book series (ASSL, volume 17)


Experiments are conducted in the solar wind to determine the velocity distribution function of the plasma which is a function of time, space, and the species of particles studied. As has been pointed out (Vasyliunas, 1969) the length scale of the instruments used is so much less than any of the characteristic lengths of the plasma, that these instruments are just devices for the analysis and measurement of charged particle beams, and do not exploit directly any of the cooperative properties of the plasma. What is done is to determine the numbers of particles (dn)/(dv) dv in various differential regions of velocity space by counting them, and then either to fit to an assumed function, or use these values of differential density to approximate the unknown function. There are thus two problems which have been fully discussed by Vasyliunas:
  1. (a)

    The conversion of observed particle counts to values of (dn)/(dv) dv (the unfolding problem), which requires a good knowledge of the characteristics of the instrument; and

  2. (b)

    The approximation to the distribution function.



Solar Wind Solar Phys Velocity Distribution Function Interplanetary Medium Solar Wind Parameter 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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  1. Akasofu, S. E. and Yoshida, S.: 1967, Planetary Space Sci. 15, 39.ADSCrossRefGoogle Scholar
  2. Burlaga, L. F.: 1968, Solar Phys. 4, 67.ADSCrossRefGoogle Scholar
  3. Burlaga, L. F.: 1969a, Solar Phys. 7, 72.ADSCrossRefGoogle Scholar
  4. Burlaga, L. F.: 1969b, Solar Phys. 7, 54.ADSCrossRefGoogle Scholar
  5. Burlaga, L. F. and Ness, N. F.: 1969, Solar Phys. 9, 467.ADSCrossRefGoogle Scholar
  6. Burlaga, L. F. and Ogilvie, K. W.: 1968, J. Geophys. Res. 73, 6167.ADSCrossRefGoogle Scholar
  7. Burlaga, L. F. and Ogilvie, K. W.: 1969, NASA-GSFC, X-616-69-142.Google Scholar
  8. Burlaga, L. F. and Ogilvie, K. W.: 1970, Astrophys. J. 159 (in press).Google Scholar
  9. Fairfield, D. H.: 1968, J. Geophys. Res. 73, 6179.ADSCrossRefGoogle Scholar
  10. Gold, T.: 1955, in Gas Dynamics of Cosmic Clouds, North-Holland Publishing Company, Amsterdam, Holland.Google Scholar
  11. Gosling, J. T., Asbridge, J. R., Bame, S. J., Hundhausen, A. H., and Strong, I. B.: 1967, J. Geophys. Res. 72, 3357.CrossRefGoogle Scholar
  12. Hartle, R. E. and Sturrock, P. A.: 1968, Astrophys. J. L51, 1155.CrossRefGoogle Scholar
  13. Hartle, R. E. and Barnes, A.: 1969, to be published.Google Scholar
  14. Hirschberg, J.: 1968, Planetary Space Sci. 16, 309.ADSCrossRefGoogle Scholar
  15. Hundhausen, A. J. and Gentry, R. A.: 1969, J. Geophys. Res. 74, 2908.ADSCrossRefGoogle Scholar
  16. Hundhausen, A. J., Bame, S. J., and Ness, N. F.: 1967, J. Geophys. Res. 72, 5265.ADSCrossRefGoogle Scholar
  17. Hundhausen, A. J., Gilbert, H. E., and Bame, S. J.: 1968, Astrophys. J. 152, L3.ADSCrossRefGoogle Scholar
  18. Jokipii, J. R. and Davis, L. R.: 1968, Enrico Fermi Institute Preprint No. 68-68.Google Scholar
  19. Kennel, C. F. and Scarf, F. L.: 1968, J. Geophys. Res. 73, 6149.ADSCrossRefGoogle Scholar
  20. Lazarus, A. J., Ogilvie, K. W., and Burlaga, L. F.: 1970, submitted to Solar Physics.Google Scholar
  21. Neugebauer, M. and Snyder, C. W.: 1966, J. Geophys. Res. 71, 4469.ADSGoogle Scholar
  22. Nishida, A.: 1964, Rep. Ion. Space Res. Japan, 18, 295.Google Scholar
  23. Ogilvie, K. W. and Burlaga, L. F.: 1969, Solar Phys. 8, 422.ADSCrossRefGoogle Scholar
  24. Ogilvie, K. W., Burlaga, L. F., and Richardson, H.: 1967, NASA-GSFC, 612-67-503.Google Scholar
  25. Ogilvie, K. W., Burlaga, L. F., and Wilkerson, T. D.: 1968, J. Geophys. Res. 73, 6809.ADSCrossRefGoogle Scholar
  26. Ogilvie, K. W. and Wilkerson, T. D.: 1969, Solar Phys. 8, 435.ADSCrossRefGoogle Scholar
  27. Parker, E. N.: 1963, in Interplanetary Dynamical Processes, Interscience Publishers, New York.zbMATHGoogle Scholar
  28. Sen, A. K.: 1963, Phys. Fluids 6, 1154.MathSciNetADSzbMATHCrossRefGoogle Scholar
  29. Sen, A. K.: 1964, Phys. Fluids 7, 1293.MathSciNetADSzbMATHCrossRefGoogle Scholar
  30. Siscoe, G. L., Formisano, V., and Lazarus, A. J.: 1968, J. Geophys. Res. 73, 4869.ADSCrossRefGoogle Scholar
  31. Sonett, C. P. and Colburn, D. S.: 1963, Planet. Space Sci. 13, 675.ADSCrossRefGoogle Scholar
  32. Sonett, C. P., Colburn, D. S., and Briggs, B. R.: 1966, in The Solar Wind, Pergamon Press, New York.Google Scholar
  33. Strong, I. B., Asbridge, J. R., Bame, S. J., and Hundhausen, A. J.: 1967, NASA-SP150.Google Scholar
  34. Sturrock, P. A. and Hartle, R. E.: 1966, Phys. Rev. Letters 16, 628.ADSCrossRefGoogle Scholar
  35. Taylor, H. E.: 1968, NASA-GSFC X-616-68-239.Google Scholar
  36. Vasyliunas, V. M.: 1969, ‘Methods of Experimental Physics’. IX Plasma Physics.Google Scholar
  37. Wolfe, J. H. and McKibbin, D. C.: 1968, Planet. Space Sci. 16, 953.ADSCrossRefGoogle Scholar

Copyright information

© D. Reidel Publishing Company, Dordrecht, Holland 1970

Authors and Affiliations

  • K. W. Ogilvie
    • 1
  • L. F. Burlaga
    • 1
  1. 1.Laboratory for Space SciencesNASA-Goddard Space Flight CenterGreenbeltUSA

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