Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

A galactic model with a pulsating active nucleus

III: Evolution of rare-light elements

  • 28 Accesses

  • 2 Citations


The accumulation and distribution of rare-light elements in the Galaxy is investigated according to a model of the galaxy at which center there exists a pulsating active nucleus with decreasing activity with time. The abundances of rare-light elements rapidly decrease with approaching to the galactic center whereas the most abundant region of these elements is the annular region of the radial distance ofr=8∼14 kpc from the galactic center. In the inner region ofr≪8 kpc the abundances of these elements have varied by two to three orders of magnitude from the early days of the galactic history till now, but inr≳8 kpc they have been almost constant within a factor of 2. It has become clear that if the nuclides D,3He,7Li,10B and11B have been produced mainly by the shock process taking place in the outer envelope of type-II supernova, they must have been created by the mass fractions of the supernova of some 2.7×10−3, 1.7×10−4, 6.9×10−8, 1.7×10−7 and 7.9×10−7, respectively, to account for the solar system abundances.

This is a preview of subscription content, log in to check access.


  1. Arnett, W. D.: 1969,Astrophys. Space Sci. 5, 180.

  2. Audouze, J. and Truran, J. W.: 1973,Astrophys. J. 182, 839.

  3. Barkat, Z., Wheeler, J. C., and Buchler, J. R.: 1972,Astrophys. J. 171, 651.

  4. Cameron, A. G. W.: 1969, in L. H. Ahrens (ed.),The Origin and Distribution of the Elements, Pergamon Press, New York, p. 126.

  5. Cameron, A. G. W. and Fowler, W. A.: 1971,Astrophys. J. 164, 111.

  6. Cameron, A. G. W., Colgate, S. A., and Grossman, L.: 1973,Nature 243, 204.

  7. Caswell, J. L.: 1970,Astron. Astrophys. 7, 59.

  8. Cesarsky, D. A., Moffet, A. T., and Pasachoff, J. M.: 1973,Astrophys. J. 180, L1.

  9. Chai, C. and Van den Bergh, S.: 1970,Astron. J. 75, 672.

  10. Colgate, S. A.: 1973,Astrophys. J. 181, L53.

  11. Downes, D.: 1971,Astron. J. 76, 305.

  12. Gunn, J. E. and Ostriker, J. P.: 1970,Astrophys. J. 160, 979.

  13. Hoyle, F. and Fowler, W. A.: 1973,Nature 241, 384.

  14. Iben, I. Jr.: 1966,Astrophys. J. 143, 483, 505, and 516.

  15. Iben, I. Jr.: 1967,Astrophys. J. 147, 624, and 650.

  16. Ilovaisky, S. A. and Lequeux, J.: 1972,Astron. Astrophys. 20, 347.

  17. Larson, R. B.: 1972,Nature 236, 21.

  18. Meneguzzi, M., Audouze, J., and Reeves, H.: 1971,Astron. Astrophys. 15, 337.

  19. Milne, D. K.: 1970,Austral. J. Phys. 23, 425.

  20. Mitler, H.: 1972,Astrophys. Space Sci. 17, 186.

  21. Ohnishi, T.: 1973,Astrophys. Space Sci. 25, 217 (Paper I).

  22. Ohnishi, T.: 1974,Astrophys. Space Sci. 28, 325 (Paper II).

  23. Paczyński, B.: 1970,Acta Astron. 20, 47.

  24. Reeves, H., Audouze, J., Fowler, W. A., and Schramm, D. N.: 1973,Astrophys. J. 179, 909.

  25. Reeves, H., Fowler, W. A., and Hoyle, F.: 1970,Nature 226, 727.

  26. Salpeter, E. E.: 1959,Astrophys. J. 129, 608.

  27. Sanduleak, N.: 1969,Astron. J. 74, 47.

  28. Shklovsky, I. S.: 1965,Soviet Astron-AJ 8, 638.

  29. Sofia, S.: 1972,Astrophys. J. 172, 53.

  30. Tammann, G. A.: 1970,Astron. Astrophys. 8, 458.

  31. Truran, J. W. and Cameron, A. G. W.: 1971,Astrophys. Space Sci. 14, 179.

  32. Vaucouleurs, G. de: 1972,Nature Phys. Sci. 239, 139.

  33. Wamsteker, W., Wisniewsky, W. Z., Lee, T. A., and Wdowiak, T. J.: 1973,Nature Phys. Sci. 241, 7.

Download references

Author information

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Ohnishi, T. A galactic model with a pulsating active nucleus. Astrophys Space Sci 29, 3–16 (1974).

Download citation