News | Published:

Another Double Star Process giving Very Fast Particles

Nature volume 139, pages 245246 (06 February 1937) | Download Citation



IN a recent letter1 I pointed out that in order to explain the energies found in cosmic radiation it is necessary to introduce only one hypothesis: that the components of the double stars are magnetic dipoles (as the earth and the sun). Then a rotating double star acts as a cyclotron. A more detailed calculation2 shows that energies of 1010 or 1011 (perhaps 1012) electron volts are attainable, but as the accelerating process is rather complicated it seems unlikely that it can be responsible for the total intensity of cosmic radiation. Therefore it may be of interest to point out that there are also—other and more simple—double star processes which are able to give high-energy particles.


  1. 1.

    NATURE, 138, 761 (1936).

  2. 2.

    Z. Phys., in the press.

Download references

Author information


  1. Physics Laboratory, Uppsala. Dec. 18.



  1. Search for HANNES ALFVÉN in:

About this article

Publication history




By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.

Newsletter Get the most important science stories of the day, free in your inbox. Sign up for Nature Briefing