Evidence for a common origin of the electrons responsible for the impulsive X-ray and type III radio bursts

✍ Scribed by S. R. Kane

• Publisher: Springer
• Year: 1972
• Tongue: English
• Weight: 766 KB
• Volume: 27
• Category: Article
• ISSN: 0038-0938
• DOI: 10.1007/bf00151781

✦ Synopsis

Observations of impulsive solar flare X-rays > 10 keV made with the OGO-5 satellite are compared with ground based measurements of type III solar radio bursts in 10-580 MHz range. It is shown that the times of maxima of these two emissions, when detectable, agree within ~ 18 s. This maximum time difference is comparable to that between the maxima of the impulsive X-ray and impulsive microwave bursts. In view of the various observational uncertainties, it is argued that the observations are consistent with the impulsive X-ray, impulsive microwave, and type Ill radio bursts being essentially simultaneous. The observations are also consistent with 10--100 keV electron streams being responsible for the type III emission. It is estimated that the total number of electrons > 22 keV required to produce a type III burst is < 1034. The observations indicate that the non-thermal electron groups responsible for the impulsive X-ray, impulsive microwave, and type III radio bursts are accelerated simultaneously in essentially the same region of the solar atmosphere.