Possible evidence for beaming in flares from microwave and hard X-rayimaging and spectra.
Abstract
The authors have observed the impulsive phase of a solar flare at microwave wavelengths and in hard X-rays, and deduced the strength of the magnetic field and the number of energetic electrons producing the burst. The combined data show that the derived number of microwave emitting electrons is at least three orders of magnitude fewer than the number of thick target electrons producing the hard X-rays. The authors propose that the reason for this discrepancy in numbers is that the fast electrons are highly beamed, and radiate gyrosynchrotron emission less efficiently than isotropically distributed electrons.
- Publication:
-
The Lower Atmosphere of Solar Flares
- Pub Date:
- 1986
- Bibcode:
- 1986lasf.conf..396S
- Keywords:
-
- Electron Beams;
- Microwave Spectra;
- Solar Flares;
- X Ray Spectra;
- Electron Energy;
- Solar Magnetic Field;
- Stellar Spectrophotometry;
- Synchrotron Radiation;
- Solar Physics;
- Solar Flares:Electrons;
- Solar Flares:Hard X Rays;
- Solar Flares:VLA Observations