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Diffuse gamma radiation
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Fichtel, C. E. Thompson, D. J. Simpson, G. A. |
| Copyright Year | 1977 |
| Description | An examination of the intensity, energy spectrum, and spatial distribution of the diffuse gamma-radiation observed by SAS-2 satellite away from the galactic plane in the energy range above 35 MeV has shown that it consists of two components. One component is generally correlated with galactic latitudes, the atomic hydrogen column density was deduced from 21 cm measurements, and the continuum radio emission, believed to be synchrotron emission. It has an energy spectrum similar to that in the plane and joins smoothly to the intense radiation from the plane. It is therefore presumed to be of galactic origin. The other component is apparently isotropic, at least on a coarse scale, and has a steep energy spectrum. No evidence is found for a cosmic ray halo surrounding the galaxy in the shape of a sphere or oblate spheroid with galactic dimensions. Constraints for a halo model with significantly larger dimensions are set on the basis of an upper limit to the gamma-ray anisotropy. |
| File Size | 1951673 |
| Page Count | 63 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19780008042 |
| Archival Resource Key | ark:/13960/t1gj4918g |
| Language | English |
| Publisher Date | 1977-12-01 |
| Access Restriction | Open |
| Subject Keyword | Space Radiation Gamma Rays Galactic Structure Galaxies Radiation Sources Spectrum Analysis Milky Way Galaxy Gamma Ray Astronomy 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 |
