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Propagation Studies Related to the Origin of Cosmic Rays

Published online by Cambridge University Press:  14 August 2015

R. Cowsik
R. Cowsik*
Affiliation:
Tata Institute of Fundamental Research, Bombay 400005, India

Extract

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Propagation of cosmic rays is discussed with the intent of deriving results relevent to the origin of cosmic rays. Starting from a brief description of the methods for demodulating the effects of the solar wind on the spectra of particles, we describe an accurate method for correcting for spallation effects on the cosmic-ray nuclei during their transport from the sources subsequent to their acceleration. We present the composition of cosmic rays at the sources and discuss its implications to their origin. We discuss briefly the effects of stochastic acceleration in the interstellar medium on the relative spectra of primaries and secondaries in cosmic rays and show that the observation of decreasing relative abundance of secondaries with increasing energy rules out such phenomena for galactic cosmic rays. The spectrum of cosmic-ray electrons is discussed in terms of contributions from a discrete set of sources situated at various distances from the solar system on the galactic plane. We show that unless there are at least 3.104 sources actively accelerating cosmis rays in the Galaxy the spectrum of electrons would have a premature cut-off at high energies. Finally we point out some important questions that need to be clearly resolved for making further progress in the field.

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 94: Origin of Cosmic Rays , 1981 , pp. 93 - 106
Copyright
Copyright © Reidel 1981 

References

Audouze, J., Chièze, J.P. and Vangioni-Flam, E. 1980, Preprint of Institut d'Astrophysique de Paris.Google Scholar
Axford, W.I., Leer, E. and Skadron, G., 1977, Proc. 15th Internat. Cosmic Ray Conf. 2, 173 (Plovdiv).Google Scholar
Blandford, R.D., and Ostriker, J.P., 1978, Astrophys. J. (Letters), 221, L 29.CrossRefGoogle Scholar
Cameron, A.G.W. 1973, Space Sci. Rev. 15, 121.Google Scholar
Cassé, M. and Soutoul, A., 1975, Astrophys. J. (Letters) 200, L75.Google Scholar
Cowsik, R., Pal, Yash, Tandon, S.N. and Verma, R.P. 1966, Phys. Rev. Lett. 17, 1298.Google Scholar
Cowsik, R., Pal, Yash, Tandon, S.N. and Verma, R.P. 1967, Phys. Rev. 158, 1238.Google Scholar
Cowsik, R. and Wilson, L.W., 1973, Proc. 13th Internat. Cosmic Ray Conf. 1, 500 (Denver).Google Scholar
Cowsik, R. and Wilson, L.W., 1975, Proc. 14th, Internat. Cosmic Ray Conf. 2, 659 (Munich).Google Scholar
Cowsik, R. and Lee, M.A. 1977, Astrophys. J. 216, 635.Google Scholar
Cowsik, R. and Lee, M.A. 1979, ibid. 228, 297.Google Scholar
Cowsik, R., 1979, ibid. 227, 856.Google Scholar
Cowsik, R., 1979b, Proc. COSPAR Symp. Non-Solar Gamma Ray Astronomy (Bangalore, Pergamon Press ed. Cowsik, and Wills, ).Google Scholar
Cowsik, R., 1980, Astrophys. J. (to be published Nov. 1) Google Scholar
Eichler, D. 1979, Proc. 16th Internat. Cosmic Rays Conf. 2, 61, (Kyoto).Google Scholar
Fermi, E. 1949, Phys. Rev., 75, 1169.Google Scholar
Muñoz, Garcia and Simpson, J.A. 1979, Proc. 16th Internat. Cosmic Ray Conf. 1, 270.Google Scholar
Giler, M., Wdowczyk, J., Wolfendale, A.W. 1980, Ast. Astrophys., 84, 44.Google Scholar
Ginzburg, V.L. and Syrovatskii, S.I., 1964, The Origin of Cosmic Rays, (Pergamon Press, New York).Google Scholar
Hartmann, G., Müller, D. and Price, T., 1977, Phys. Rev. Lett., 38, 1368.Google Scholar
Havnes, O., 1973, Ast. Astrophys., 24, 435.Google Scholar
Honda, M. 1979, Proc. 16th Internat. Cosmic. Ray Conf. 14, 159 (Kyoto).Google Scholar
Hundhausen, A.J., Sime, D.G., Hansen, R.T. and Hansen, S.F. 1980, Science, 207, 761.Google Scholar
Jokipii, J.R., Levy, E.H. and Hubbard, W.B., 1976, Astrophys. J., 213, 816.Google Scholar
Jokipii, J.R. 1977, Proc. 15th Internat. Cosmic Ray Conf. 2, 429 (Plovdiv).Google Scholar
Kristiansson, K., 1974, Astrophys. Space Sci., 30, 417.Google Scholar
Meyer, J.P. 1979, Proc. 16th Internat. Cosmic Ray Conf. 2, 115 (Kyoto) Google Scholar
Meyer, J.P., Cassé, M. and Reeves, H. 1980, CENS preprint.Google Scholar
Orth, C.D., Buffington, A., Smoot, G.F. and Mast, T.S., 1978, Astrophys. J. 226, 1147.Google Scholar
Ormes, J. and Freier, P. 1978, Astrophys. J. 222, 471.Google Scholar
Parker, E.N., 1966, Planet. Space Sci., 13, 9.Google Scholar
Silberberg, R. 1980, pvt. comm.Google Scholar
Sreekantan, B.V. 1979, Proc. 16th Internat. Cosmic Ray Conf. 14, 345.Google Scholar
Svalgaard, L. and Wilcox, J.M. 1976, Nature, 262, 766.Google Scholar
Wilson, L.W. 1979, , Univ. of California (Berkeley).Google Scholar