Pulsed Radio Sources

  • F. Hoyle
  • J. Narlikar


The recent discovery1 of rapidly pulsed radio sources and the further detailed observations2 of the source CP 1919 + 22 raise remarkable problems. Undoubtedly the theory which requires the least change in our concepts is that of a pulsating white dwarf. As long ago as 1952, Mestel3 pointed out that nuclear fuel in the outer regions of a white dwarf can cause an explosive instability. There is therefore no difficulty in understanding how an oscillatory state might be set up. It is also possible that oscillations could be self-sustaining.


  1. 1.
    Hewish, A., Bell, S. J., Pilkington, J. D. H., Scott, P. F.. and Collins, R. A., Nature, 217, 709 (1968), (Paper 1).ADSCrossRefGoogle Scholar
  2. 2.
    Davies, J. G., Horton, P. W., Lyne, A. G., Rickett, B. J., and Smith, F. G., Nature, 217, 910 (1968), (Paper 6).ADSCrossRefGoogle Scholar
  3. 3.
    Mestel, L., Mon. Not. Roy. Astro. Soe., 112, 598 (1952).ADSGoogle Scholar
  4. 4.
    Meltzer, D. W., and Thome, K. S., Ap. J., 145, 514 (1966).ADSCrossRefGoogle Scholar
  5. 5.
    Thorne, K. S., and Ipser, J. R., Ap. J. Letters (in the press).Google Scholar
  6. 6.
    Saslaw, W. C, Faulkner, J., and Strittmatter, P. A., Nature, 217, 1222 (196.8), (Paper 42).CrossRefGoogle Scholar
  7. 7.
    Hoyle, F., Narlikar, J. V., and Wheeler, J. A., Nature, 203, 914 (1964).ADSCrossRefzbMATHGoogle Scholar
  8. 8.
    Hoyle, F., and Fowler, W. A., Ap. J., 132, 565 (1960).ADSCrossRefGoogle Scholar
  9. 9.
    Fowler, W. A., and Hoyle, F., Ap. J. Suppl., 91 (1964).Google Scholar

Copyright information

© Springer Science+Business Media New York 1968

Authors and Affiliations

  • F. Hoyle
    • 1
  • J. Narlikar
    • 1
  1. 1.Institute of Theoretical AstronomyUniversity of CambridgeUK

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