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The Acceleration of Galactic Cosmic Rays

Published online by Cambridge University Press:  14 August 2015

W. I. Axford
W. I. Axford*
Affiliation:
Max-Planck-Institut für Aeronomie, D-3411 Katlenburg-Lindau 3, Germany

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Although it is clear that cosmic rays are of considerable astrophysical significance we know surprisingly little about their origin(s), their mode(s) of propagation and escape from the galaxy, and even of their general properties. Practically nothing is known of the composition and energy spectra of different species at energies below about 200 MeV/nucleon as a consequence of solar modulation, which has a significant effect on the observed spectra at energies up to about 10 GeV/ nucleon. The energy spectra of ions (especially protons) appear to be well approximated by a power law (differential spectral index γ ~ 2.6) in the range 1010–1015 eV/nucleon. At higher energies (up to ~ 1020 eV/nucleon) both the spectrum and the composition of the ion component are less well known, however it is significant that the anisotropy, as evidenced from the sidereal diurnal variation, increases substantially, suggesting that perhaps an extragalactic origin must be considered.

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 94: Origin of Cosmic Rays , 1981 , pp. 339 - 358
Copyright
Copyright © Reidel 1981 

References

Alexeyev, I.I. and Kropotkin, A.P.: 1970, Geomag. Aeron. 10, 755.Google Scholar
Armstrong, T.P. and Krimigis, S.M.: 1976, J. Geophys. Res. 81, 677.CrossRefGoogle Scholar
Axford, W.I.: 1962, J. Geophys. Res. 67, 3791.CrossRefGoogle Scholar
Axford, W.I. and Reid, G.C.: 1962, J. Geophys. Res. 67, 1692.Google Scholar
Axford, W.I. and Reid, G.C.: 1963, J. Geophys. Res. 68, 1793.Google Scholar
Axford, W.I.: 1969, Rev. Geophys. 7, 421.Google Scholar
Axford, W.I.: 1972, “Solar Wind“, NASA SP-308, 609.Google Scholar
Axford, W.I.: 1977, ‘Study of Interplanetary Travelling Phenomena’, (ed. Shea, M.A. et al.), Reidel, 145.Google Scholar
Barnes, G.W. and Simpson, J.A.: 1976, Astrophys. J. 210, L91.Google Scholar
Bell, A.R.: 1978, M.N.R.A.S. 182, 147 and 443.CrossRefGoogle Scholar
Biermann, L.: 1948, Z. Astrophys. 25, 161.Google Scholar
Blandford, R.D. and Ostriker, F.R.: 1978, Astrophys. J. 221, 229.CrossRefGoogle Scholar
Blandford, R.D.: 1980, in press.Google Scholar
Bryant, D.A., Cline, T.L., Desai, U.D., and McDonald, F.B.: 1962, J. Geophys. Res. 67, 4983.CrossRefGoogle Scholar
Bulanov, S.V. and Dogiel, V.A.: 1979, Proc. 16th Internat. Cosmic Ray Conf. (Kyoto) 2, 70.Google Scholar
Bykov, A.M. and Toptygin, I.N.: 1979, Proc. 16th Internat. Cosmic Ray Conf. (Kyoto) 3, 66.Google Scholar
Cassé, M., Goret, P., and Cesarsky, C.J.: 1975, Proc. 14th Internat. Cosmic Ray Conf. (Munich) 2, 646.Google Scholar
Cassé, M. and, Paul, J.A.: 1979, Proc. 16th Internat. Cosmic Ray Conf. (Kyoto) 2, 103.Google Scholar
Cesarsky, C.J.: 1980, Ann. Rev. Astron. Astrophys., in press.Google Scholar
Chen, G. and, Armstrong, T.P.: 1975, Proc. 14th Internat. Cosmic Ray Conf. (Munich) 5, 1814.Google Scholar
Chevalier, R.A.: 1977, Astrophys. J. 213, 52.CrossRefGoogle Scholar
Colgate, S.A. and Johnson, M.H.: 1960, Phys. Rev. Lett. 5, 235.Google Scholar
Colgate, S.A.: 1979, Proc. Symp. on ‘Very Hot Plasmas in the Universe’, IAU (Montreal), in press.Google Scholar
Cowsik, R. and, Lee, M.A.: 1980, in press.Google Scholar
Dolginov, A.Z. and Toptygin, I.N.: 1966, JETP 51, 1771.Google Scholar
Dorman, L.I.: 1963, Prog. Elem. Part. and C.R. Phys. 7.Google Scholar
Dorman, L.I. and Freidman, G.I.: 1959, “Problems of MHD and Plasma Physics“ (Riga), 77.Google Scholar
Dorman, L.I.: 1979, Proc. 16th Internat. Cosmic Ray Conf. (Kyoto) 2, 49.Google Scholar
Eichler, D.: 1979, Astrophys. J. 229, 419.Google Scholar
Fermi, E.: 1949, Phys. Rev. 75, 1169.Google Scholar
Fermi, E.: 1954, Astrophys. J. 119, 1.CrossRefGoogle Scholar
Fisk, L.A.: 1969, , U.C.S.D. Google Scholar
Fisk, L.A.: 1971, J. Geophys. Res. 76, 1662.Google Scholar
Fisk, L.A., Kozlovsky, B., and, Ramaty, R.: 1974, Astrophys. J. 190, 235.Google Scholar
Fisk, L.A.: 1976, J. Geophys. Res. 75, 1169.Google Scholar
Fisk, L.A. and Lee, M.A.: 1980, Astrophys. J., in press.Google Scholar
Forman, M.A. and Morfill, G.: 1979, Proc. 16th Internat. Cosmic Ray Conf. (Kyoto) 5, 328.Google Scholar
Forman, M.A. and Schaeffer, O.A.: 1979, Rev. Geophys. Space Phys. 17, 552.Google Scholar
Forman, M.A.: 1980, Proc. COSPAR Symp. on the Heliosphere, in press.Google Scholar
Frisch, P.C.: 1979, Astrophys. J. 227, 474.Google Scholar
Garcia-Munoz, M., Mason, G.M., and Simpson, J.A.: 1977, Astrophys. J. 217, 859.Google Scholar
Giler, M., Wdowczyk, T., and Wolfendale, A.W.: 1979, Proc. 16th Internat. Cosmic Ray Conf. (Kyoto) 1, 507.Google Scholar
Gleeson, L.J. and Axford, W.I.: 1967, Astrophys. J. 149, L115.Google Scholar
Hamilton, D.C., Glockler, G., Armstrong, T.P., Axford, W.I., Bostrom, C.D., Fan, C.Y., Krimigis, S.M., and, Lanzerotti, L.J.: 1979, Proc. 16th Internat. Cosmic Ray Conf. (Kyoto) 5, 363.Google Scholar
Hasselmann, K. and Wibberenz, G.: 1968, Z. Geophys. 34, 353.Google Scholar
Honda, M.: 1979, Proc. 16th Internat. Cosmic Ray Conf. (Kyoto) 14, 159.Google Scholar
Hoyle, F.: 1960, M.N.R.A.S. 120, 338.CrossRefGoogle Scholar
Hudson, P.D.: 1965, M.N.R.A.S. 131, 23.Google Scholar
Illingworth, C.R.: 1953, Chapter 4 of “Modern Developments in Fluid Dynamics“ (ed. Howarth, L.), Oxford.Google Scholar
Johnson, H.E. and Axford, W.I.: 1971, Astrophys. J. 165, 381.CrossRefGoogle Scholar
Johnson, R.G.: 1979, Rev. Geophys. Space Phys. 17, 696.Google Scholar
Jokipii, J.R. and Davis, L. Jr.: 1964, Phys. Rev. Lett. 13, 739.Google Scholar
Jokipii, J.R.: 1966, Astrophys. J. 143, 961.CrossRefGoogle Scholar
Jokipii, J.R.: 1968, Astrophys. J. 152, 799.Google Scholar
Jokipii, J.R.: 1977, Proc. 15th Internat. Cosmic Ray Conf. (Plovdiv) 1, 429.Google Scholar
Kahn, F.D. and Dyson, J.E.: 1965, Ann. Rev. Astron. Astrophys. 3, 47.Google Scholar
Kahn, F.D. and Dyson, J.E.: 1965, Ann. Rev. Astron. Astrophys. 3, 47.Google Scholar
Kanbach, G.: 1979, Proc. 16th Internat. Cosmic Ray Conf. (Kyoto) 14, 105.Google Scholar
Klecker, B.: 1977, J. Geophys. Res. 82, 5287.Google Scholar
Krimsky, G.F.: 1977, Dok. Akad. Nauk, SSR, 234, 1306.Google Scholar
Krimsky, G.F., Kuzmin, A.I., and, Petukhov, S.I.: 1979a, Proc. 16th Internat. Cosmic Ray Conf. (Kyoto) 2, 44.Google Scholar
Krimsky, G.F., Kuzmin, A.I., and Petukhov, S.I.: 1979b, Proc. 16th Internat. Cosmic Ray Conf. (Kyoto) 2, 75.Google Scholar
Leer, E., Skadron, G., and Axford, W.I.: 1976, EOS 57, 780.Google Scholar
Lingenfelter, R.E.: 1979, Proc. 16th Internat. Cosmic Ray Conf. (Kyoto) 14, 135.Google Scholar
Meyer, P., Ramaty, R., and Webber, W.R.: 1974, Phys. Today 27, 23.Google Scholar
Meyer, J.P., Cassé, M., and Reeves, H.: 1979, Proc. 16th Internat. Cosmic Ray Conf. (Kyoto) 12, 108.Google Scholar
Newman, R.C. and Axford, W.I.: 1968, Astrophys. J. 153, 595.Google Scholar
Ostriker, J.P.: 1979, Proc. 16th Internat. Cosmic Ray Conf. (Kyoto) 2, 124.Google Scholar
Parker, E.N.: 1958, Phys. Rev. 109, 1328.Google Scholar
Parker, E.N.: 1963, Interplanetary Dynamical Processes, (New York: Interscience Publishers).Google Scholar
Parker, E.N.: 1965, Planet. Space Sci. 13, 9.Google Scholar
Pesses, M.E.: 1979, Proc. 16th Internat. Cosmic Ray Conf. (Kyoto) 2, 18.Google Scholar
Richter, A.K. and Keppler, E.: 1977, J. Geophys. 42, 645.Google Scholar
Sarris, E.T. and Van Allen, J.A.: 1974, J. Geophys. Res. 79, 4157.Google Scholar
Sarris, E.T., Krimigis, S.M., and Armstrong, T.P.: 1976, Geophys. Res. Lett. 2, 133.CrossRefGoogle Scholar
Sarris, E.T. and Axford, W.I.: 1979, Nature 277, 460.Google Scholar
Schatzmann, E.: 1963, Ann. d'Astrophysique 137, 135.Google Scholar
Scholer, M. and Morfill, G.: 1975, Solar Phys. 45, 227.Google Scholar
Schulz, M. and Lanzerotti, L.J.: 1974, ‘Particle Diffusion in the Radiation Belts’, Springer, New York.Google Scholar
Skadron, G. and Axford, W.I.: 1976, EOS 57, 980.Google Scholar
Sonnerup, B.U.O.: 1969, J. Geophys. Res. 74, 1301.CrossRefGoogle Scholar
Swift, D.W.: 1979, Rev. Geophys. Space Phys. 17, 681.Google Scholar
Somayajulu, B.L.K.: 1977, Geochim. et Cosmochim. Acta 41, 909.Google Scholar
Terasawa, T.: 1979a, Planet. Space Sci. 27, 193.Google Scholar
Terasawa, T.: 1979b, Planet. Space Sci. 27, 365.CrossRefGoogle Scholar
Thompson, W.B.: 1955, Proc. Roy. Soc. London A223, 402.Google Scholar
Toptygin, I.N.: 1979, Isv. Akad. Nauk SSR 43, 755.Google Scholar
Tveskoi, B.A.: 1978, Proc. 10th Leningrad Symposium, 137.Google Scholar
Van Allen, J.A.: 1959, J. Geophys. Res. 64, 1683.Google Scholar
Van Allen, J.A. and Ness, N.F.: 1967, J. Geophys. Res. 72, 935.Google Scholar
Volk, H.J., Morfill, G., and Forman, M.A.: 1979, Proc. 16th Int. Cosmic Ray Conf. (Kyoto) 2, 38a.Google Scholar
Webber, W.R., Goeman, R.A., and Yushak, S.M.: 1979, Proc. 16th Internat. Cosmic Ray Conf. (Kyoto), 1, 495.Google Scholar
Wentzel, D.G.: 1962, Astrophys. J. 137, 135.Google Scholar
Wentzel, D.G.: 1964, Astrophys. J. 140, 1013.Google Scholar
Wolfendale, A.W.: 1977, Proc. 15th Int. Cos. Ray Con. (Plovdiv) 10, 235.Google Scholar