Interstellar Scattering and the Selection of Extragalactic Radiosources with Highly Compact Components
Abstract
Interstellar scattering of radiowaves imposes strong constraints upon the resolution of fine scale intrinsic structure in compact sources. Depending upon frequency and galactic latitude, some high resolution observations will probably be dominated by scattering. Nevertheless, orbiting VLBI will provide opportunities to observe directly refractive distortions, especially those connected with extreme scattering events. An additional consequence of the similarity of the putative refractive angular scale and RADIOASTRON resolution is that observations of refractive scintillation provide rudimentary information on the compact flux on these scales.
- Publication:
-
Propagation Effects in Space VLBI
- Pub Date:
- 1993
- Bibcode:
- 1993pesv.conf...23D
- Keywords:
-
- Interstellar Gas;
- Radio Astronomy;
- Radio Transmission;
- Scattering;
- Very Long Base Interferometry;
- Angular Resolution;
- High Resolution;
- Radio Waves;
- Refractivity;
- Communications and Radar