Cosmic ray flux versus pairticle energy

Cosmic rays are very heich-energy particles, mainly oreeginatin ootside the Solar Seestem.[1] Thay mey produce showers o seicontary particles that penetrate an impact the Yird's atmosphere an whiles even reach the surface. Componed primarily o heich-energy protons an atomic nuclei, thay are o mysterious origin. Data frae the Fermi space telescope (2013)[2] hae been interpreted as evidence that a significant fraction o primary cosmic rays originate frae the supernovae o massive starns.[3] Houiver, this is nae thoucht tae be thair anly soorce. Active galactic nuclei probably an aa produce cosmic rays.


  1. Sharma (2008). Atomic And Nuclear Physics. Pearson Education India. p. 478. ISBN 978-81-317-1924-4.
  2. Ackermann, M.; Ajello, M.; Allafort, A.; Baldini, L.; Ballet, J.; Barbiellini, G.; Baring, M. G.; Bastieri, D.; Bechtol, K.; Bellazzini, R.; Blandford, R. D.; Bloom, E. D.; Bonamente, E.; Borgland, A. W.; Bottacini, E.; Brandt, T. J.; Bregeon, J.; Brigida, M.; Bruel, P.; Buehler, R.; Busetto, G.; Buson, S.; Caliandro, G. A.; Cameron, R. A.; Caraveo, P. A.; Casandjian, J. M.; Cecchi, C.; Celik, O.; Charles, E.; Chaty, S. (2013-02-15). "Detection of the Characteristic Pion-Decay Signature in Supernova Remnants". Science. American Association for the Advancement of Science. 339 (6424): 807–811. arXiv:1302.3307. Bibcode:2013Sci...339..807A. doi:10.1126/science.1231160. Retrieved 2013-02-14.
  3. Ginger Pinholster (2013-02-13). "Evidence Shows that Cosmic Rays Come from Exploding Stars".