Microbursts at Meter-Decameter Wavelengths
Abstract
We study the characteristics of microbursts using a large data base obtained with the multifrequency radioheliograph of the Clark Lake Radio Observatory. Most of the new observations were made during July 29, 1985 to August 2, 1985; we also include for statistical studies the microburst data used in our earlier studies. We perform a statistical analysis of many characteristics such as frequency drift, source size and brightness temperature and compare them with the properties of normal type III bursts. We investigate the coronal structures and surface activities associated with some of the events. We find that (i) the brightness temperature is in the range 6 × 105 K to 6 × 107 K; (ii) the drift rate of the microbursts is slightly smaller than that of normal type III bursts, implying electron beams with speeds ∼0.2c.
- Publication:
-
Solar Physics
- Pub Date:
- May 1990
- DOI:
- 10.1007/BF00158521
- Bibcode:
- 1990SoPh..127..165T
- Keywords:
-
- Brightness Temperature;
- Decametric Waves;
- Electron Beams;
- Solar Corona;
- Solar Radio Bursts;
- Frequency Shift;
- Plasma Waves;
- Spectroheliographs;
- Statistical Analysis;
- Type 3 Bursts;
- Solar Physics;
- Electron Beam;
- Surface Activity;
- Brightness Temperature;
- Plasma Wave;
- Drift Rate