Frequency-time structure of pulsar scintillation
Abstract
Slow frequency drifts revealed by multichannel spectrometer observations of pulsars provide a sensitive method of detecting irregularities of electron density which are too large to cause interstellar scintillation. Observations of four pulsars are used to compare the density variations in the large- and small-scale irregularities. The values obtained are compatible with a Kolmogorov spectrum for scales in the range 10 to the 10th - 10 to the 13th cm, but suggest that the power-law index may exceed 11/3. The large irregularities offer a simple explanation of apparent reversals in two-station measurements of drift velocity.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- September 1980
- DOI:
- 10.1093/mnras/192.4.799
- Bibcode:
- 1980MNRAS.192..799H
- Keywords:
-
- Electron Density Profiles;
- Frequency Response;
- Interstellar Matter;
- Pulsars;
- Scintillation;
- Diffraction Patterns;
- Kolmogoroff Theory;
- Plasma Density;
- Solar Wind;
- Time Dependence;
- Velocity Distribution;
- Astrophysics