You are not currently logged in.
Access JSTOR through your library or other institution:
If You Use a Screen ReaderThis content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Primary γ -Rays [and Discussion]
C. E. Fichtel, T. Gold, J. L. Osborne and F. G. Smith
Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences
Vol. 277, No. 1270, A Discussion on the Origin of the Cosmic Radiation (Jan. 23, 1975), pp. 365-379
Published by: Royal Society
Stable URL: http://www.jstor.org/stable/74487
Page Count: 15
You can always find the topics here!Topics: Cosmic rays, Magnetic fields, Milky Way Galaxy, Energy spectrum, Galactic planes, Flux density, Galactic Center, Radiant flux density, Angular resolution, Cosmological models
Were these topics helpful?See somethings inaccurate? Let us know!
Select the topics that are inaccurate.
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Preview not available
Within our Galaxy, cosmic rays can reveal their presence in interstellar space and probably in source regions by their interactions with interstellar matter which lead to γ -rays with a very characteristic energy spectrum. From the study of the intensity of the high energy γ radiation as a function of galactic longitude, it is already clear that cosmic rays are almost certainly not uniformly distributed in the Galaxy and are not concentrated in the centre of the Galaxy. The galactic cosmic rays appear to be tied to galactic structural features, presumably by the galactic magnetic fields which are in turn held by the matter in the arm segments and the clouds. On the extra-galactic scale, it is now possible to say that cosmic rays are probably not at the density seen near the Earth. The diffuse celestial γ -ray spectrum that is observed presents the interesting possibility of cosmological studies and possible evidence for a residual universal cosmic-ray density, which is much lower than the present galactic cosmic-ray density.
Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences © 1975 Royal Society