Variation of extragalactic sources in the DM range. Scintillations on the interstellar structure of loops, spurs, and ridges
Abstract
Data on the variability of extragalactic sources in the dm range are interpreted in terms of a hypothesis of scintillations on the inhomogeneities of interstellar structures in the galaxy. The behavior of a scintillation index in the wide frequency band 0.325 to 2.7 GHz is explained by the theory of scintillations on the large irregularities in the weak focusing regime at the boundary of the strong focusing regime. A finite angular source size (due to scattering in the interstellar medium) and self absorption of an emitted scintillating component at the low frequency end of the observed band are taken into account.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- 1979
- Bibcode:
- 1979STIN...8030268S
- Keywords:
-
- Density Wave Model;
- Extragalactic Radio Sources;
- Galactic Structure;
- Interstellar Space;
- Scintillation;
- Decimeter Waves;
- Diffraction Patterns;
- Radio Scattering;
- Self Absorption;
- Signal Fading;
- Space Radiation