The structure, polarization, and spatial relationship of solar radio sources of spectral types I and III

✍ Scribed by K. Kai

• Publisher: Springer
• Year: 1970
• Tongue: English
• Weight: 558 KB
• Volume: 11
• Category: Article
• ISSN: 0038-0938
• DOI: 10.1007/bf00153079

✦ Synopsis

A description is given of recent high-resolution observations of the sun made at 80 MHz with the Culgoora radioheliograph. In many cases the sources of type I storms show bi-polar structure, the two components being spatially separated by about 3' arc and strongly circularly polarized in opposite senses. Similar behaviour has been found for stationary type IV bursts which appear indistinguishable from type I storms on the heliographic records. On the other hand the sources of the weakly polarized type IIl bursts show uni-polar structure. The latter avoid the precise locations of type I sources even when they are associated with the same active centre. It is suggested that the type I storms originate in strong magnetic fields above sunspots while the type III bursts originate in weak magnetic fields outside the strong-field regions, possibly in neutral sheets.