Speckles in interstellar radio-wave scattering
Abstract
Observations of speckles in the scattering disk of the Vela pulsar are presented and speckle techniques for studying and circumventing scattering of radio waves by the turbulent interstellar plasma are discussed. The speckle pattern contains, in a hologrammatic fashion, complete information on the structure of the radio source as well as the distribution of the scattering material. Speckle observations of interstellar scattering of radio waves are difficult because of their characteristically short timescales and narrow bandwidths. Here, first observations are presented, taken at 13 cm wavelength with elements of the SHEVE VLBI network, of speckles in interstellar scattering.
- Publication:
-
IAU Colloq. 131: Radio Interferometry. Theory, Techniques, and Applications
- Pub Date:
- 1991
- Bibcode:
- 1991ASPC...19..238D
- Keywords:
-
- Cosmic Plasma;
- Interstellar Space;
- Radio Scattering;
- Speckle Patterns;
- Extragalactic Radio Sources;
- Plasma Turbulence;
- Very Long Base Interferometry;
- Astronomy;
- COSMIC PLASMA;
- INTERSTELLAR SPACE;
- RADIO SCATTERING;
- SPECKLE PATTERNS;
- EXTRAGALACTIC RADIO SOURCES;
- PLASMA TURBULENCE;
- VERY LONG BASE INTERFEROMETRY