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Primary gamma rays. [resulting from cosmic ray interaction with interstellar matter
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Fichtel, C. E. |
| Copyright Year | 1974 |
| Description | Within this galaxy, cosmic rays reveal their presence in interstellar space and probably in source regions by their interactions with interstellar matter which lead to gamma rays with a very characteristic energy spectrum. From the study of the intensity of the high energy gamma 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 center 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 extragalactic scale, it is now possible to say that cosmic rays are not universal at the density seen near the earth. The diffuse celestial gamma 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. |
| File Size | 819690 |
| Page Count | 38 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19740011310 |
| Archival Resource Key | ark:/13960/t0qr9kn8q |
| Language | English |
| Publisher Date | 1974-02-01 |
| Access Restriction | Open |
| Subject Keyword | Space Radiation Gamma Rays Energy Spectra Galactic Evolution Cosmology Magnetic Fields Interstellar Matter Primary Cosmic Rays Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
