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Microbursts at Meter-Decameter Wavelengths
Published online by Cambridge University Press: 19 July 2016
Extract
A statistical analysis of Clark Lake microbursts was performed using a data base consisting of ~ 100 bursts. The results are: (1) Microburst sources are well correlated with coronal streamers and active regions. (2) The peak brightness temperature (T^) of the microbursts is in the range 6 × 105 K to 6 × 107 K (see Fig. 1; see also Kundu et al, 1986; White et al, 1986; Gopalswamy et al. 1987) whereas it is quite high for normal type III bursts (107 < Tb < 1012 K - Dulk and Suzuki, 1980). (3) The source size varies over a wide range of 5.5 − 10.5 arc min at 73.8 MHz, 8.5 − 13.5 arc min at 57.5 MHz, 10.5 − 16.5 arc mins at 50 MHz and 12.5 − 22.5 arc min at 38.5 MHz. (4) The drift rate lies mainly in the range 4.5 to 6.5 MHz s−1, with an average value of ~ 5.5 MHz s−1.
- Type
- IX. Solar Radio Emission
- Information
- Symposium - International Astronomical Union , Volume 142: Basic Plasma Processes on the Sun , 1990 , pp. 521 - 522
- Copyright
- Copyright © Kluwer 1990