Fine Structure on the Sun at 2.8 cm.
Abstract
More than 400 hours of observations of the 2.8 cm solar radio emission were obtained with the Stanford interferometer. The observations were divided into two categories: the emission of the quiet sun and the emission from active regions. The observations of the quiet sun reveal emission from fine structure in addition to the thermal emission component. This fine structure is time varying. One-dimensional power spectra of the variations show that the power decreases as F to the -2 power, and there is no significant peak in the power spectra near the observed optical five-minute oscillations. Four radio bursts were observed during observations of solar active regions. One of these bursts was classified as a simple burst, and the other three were post-burst events. Two of the post-burst events were measured for their circular polarization. The instantaneous one-dimensional resolution of the interferometer shows that the simple burst could have been in the same location as an H-alpha sub-flare which occurred at the same time. The observations of the post-burst events show that they were primarily an enhancement of the pre-existing S-component emission. The percentage of circularly polarized radiation remained essentially unchanged throughout each of the events. A model is proposed for explaining the post-burst observations. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 16, 1976
- Accession Number
- ADA037739
Entities
People
- C. John Grebenkemper
Organizations
- Stanford University