 |
 |
Astron. Astrophys. 364, 793-798 (2000)
Microwave M burst on May 3 1999
Z. Ning 1,2,3,
Y. Yan 1,3,
Q. Fu 1,3 and
Q. Lu 2
1 Chinese Academy of Sciences, Beijing Astronomical Observatory, Beijing 100012, P.R. China (ningzongjun@hotmail.com)
2 University of Fudan, Department of Physics, Shanghai 200433, P.R. China
3 Chinese Academy of Sciences, National Astronomical Observatories, Beijing 100012, P.R. China
Received 29 February 2000 / Accepted 11 August 2000
Abstract
We present a remarkable fine structure of "decimetric pulsation" event (DCIM), observed with the 2.60-3.80 GHz spectrometer in Beijing Astronomical Observatory on 3 May 1999; a "M" dynamic spectrum has been detected, thanks to the high time and frequency resolutions. We call this fine structure a microwave M burst and propose a plausible model which treats the observed M burst as an emission produced by the same electron beam travelling along magnetic lines and mirrored; this beam might be originally formed from the plasmoid of a type IV-DCIM burst. The M burst could be another radio evidence of the mirror effect on electron beam after the N-burst. It is the first time that such a feature has been detected in type IV-DCIM bursts.
Key words: Sun:
activity 
Sun: radio radiation
Send offprint requests to: Zongjun Ning
This article contains no SIMBAD objects.
Contents
- 1. Introduction
- 2. Observation
- 3. Data analysis
- 4. Discussion
- 4.1. Evolution of the fine structure
- 4.2. Mirror evidence
- 4.3. Magnetic arch
- 5. Conclusion
- Acknowledgements
- References
© European Southern Observatory (ESO) 2000
Online publication: January 29, 2001
helpdesk.link@springer.de