Electrostatic Wave Instability and Plasma Radiation from Coronal Loops |
| |
| Authors: | Stepanov A V Kliem B Krüger A Hildebrandt J |
| |
| Institution: | (1) Pulkovo Observatory, St.Petersburg, Russia;(2) Astrophysical Institute Potsdam, Germany |
| |
| Abstract: | Polarization properties of solar and stellar radio emission require, in some cases, emission below the third or fourth coronal electron gyro level,  < 3,_c; 4, _c. In the context of plasma radiation, the source parameters should be such that the  intermediate magnetic field condition 1 <
p
2
/
c
2
< 3 is satisfied. Supposing this condition, we investigate the generation of electrostatic waves in a warm background plasma with a high-energy component of magnetically trapped electrons. We invoke the conversion of upper-hybrid waves and Bernstein waves into electromagnetic radiation as being responsible for intense radio emission from a coronal magnetic loop. Moreover, odd-half harmonic emissions in the solar radio spectrum as well as the o-mode polarization at the second harmonic of the plasma frequency are natural consequence of this proposed model. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
