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Chinese Physics C> 1985, Vol. 9> Issue(4) : 385-390 

THE ANISOTROPY OF COSMIC RAY PARTICLES IN THE ENERGY RANGE 1011—1019eV

  •  Institute of High Energy Physics, Academia Sinica

  • A study of the anisotropy of primary cosmic raya is presented. The expression of the anisotropy is derived in a model of statistical discrete sources in an infinite galaxy. Using these derived formulas, the amplitudes of the first harmonic anisotropies caused by eleven supernovea nearby the Earth are estimated individually and the trend of the resultant anisotropy is investigated. It is found that the expected results can account for the power law of E0.5 of the anisotropy above the energy 5×1015eV. The Compton-Getting effect can cause an additional anisotropy which is independent of energy and added to the resultant anisotropy of these discrete sources. It is apparent that the anisotropies available in the low energy range 1011—1014eV are caused by the Compton-Getting effect. Taking the differential spectrum index γ=2.67 mersured in the same energy bound we get the streaming velocity of 35km/s with respect to the cosmic ray background.
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    [1] Efimov et al., 18th ICCR, 2 (1983), p. 149.[2] L. Horton et al., 18th ICCR, 2 (1983), p. 153.[3] "Proceeding of the cosmic ray workshop" University of Utah edited by T. K. Gaisser 10-14,Jan. 1983[4] T. H. Burnett et al., 18th ICCR, 2(1983),p. 105.[5] G. Cunnigham et al., 18th ICCR, 2 (1983), p. 157 .[6] Stamenov. J. N et al., 18th ICCR, 2 (1983). p. 111.[7] Linsley. J and Watson. A. A, 15th ICCR, 12 (1977), p .203.[8] D. M. Edge et al., J. Phys. G, 4(1978), p. 113.[9] J. F. Ormes, 18th ICCR, 2 (1983), p. 187.[10] V. L. Ginziberg and V. S. Ptuskin Reviews of Modern Physics, 46 No. 2 Part 1 (1976).[11] 徐春娴、空间科学学报.5(1985), p. 123.[12] 徐春娴. 空间科学学报, 4(1984), p253-256.[13] J .Nishimura et al., 16th ICCR, 1 (1979), p. 488.[14] P. Kiraly et al., Rivista Del Nuovo Cimento, 2 (1979), p. 1.

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XU Chun-Xian. THE ANISOTROPY OF COSMIC RAY PARTICLES IN THE ENERGY RANGE 1011—1019eV[J]. Chinese Physics C, 1985, 9(4): 385-390.
XU Chun-Xian. THE ANISOTROPY OF COSMIC RAY PARTICLES IN THE ENERGY RANGE 1011—1019eV[J]. Chinese Physics C, 1985, 9(4): 385-390. shu
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Received: 1900-01-01
Revised: 1900-01-01
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THE ANISOTROPY OF COSMIC RAY PARTICLES IN THE ENERGY RANGE 1011—1019eV

    Corresponding author: XU Chun-Xian,
  • Institute of High Energy Physics, Academia Sinica
  • Received Date: 1900-01-01
  • Accepted Date: 1900-01-01
  • Available Online: 1985-08-05

Abstract: A study of the anisotropy of primary cosmic raya is presented. The expression of the anisotropy is derived in a model of statistical discrete sources in an infinite galaxy. Using these derived formulas, the amplitudes of the first harmonic anisotropies caused by eleven supernovea nearby the Earth are estimated individually and the trend of the resultant anisotropy is investigated. It is found that the expected results can account for the power law of E0.5 of the anisotropy above the energy 5×1015eV. The Compton-Getting effect can cause an additional anisotropy which is independent of energy and added to the resultant anisotropy of these discrete sources. It is apparent that the anisotropies available in the low energy range 1011—1014eV are caused by the Compton-Getting effect. Taking the differential spectrum index γ=2.67 mersured in the same energy bound we get the streaming velocity of 35km/s with respect to the cosmic ray background.

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