On theories of solar type Ⅲ radio bursts  

作　　者：WU ChingSheng 

机构地区：[1]Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, China

出　　处：《Chinese Science Bulletin》2012年第12期1357-1361,共5页

基　　金：supported by the National Natural Science Foundation of China(10973043and41074107);the National Basic Research Program of China(2011CB811402);supported in part by the National Central University in Taiwan,China

摘　　要：In solar radiophysics,many theories for type Ⅲ bursts have been proposed during the past 60 years.Almost all these theories are based on the plasma hypothesis,which assumes that(i)the radiation is mainly generated by Langmuir waves via nonlinear processes and(ii)the radiation has frequencies close to the local plasma frequency and/or its second harmonic in the source region. We feel strongly that it is time to advocate an alternative approach without recourse to the plasma hypothesis.This brief discussion explains why.In solar radiophysics, many theories for type Ⅲ bursts have been proposed during the past 60 years. Almost all these theories are based on the plasma hypothesis, which assumes that （i） the radiation is mainly generated by Langmuir waves via nonlinear pro- cesses and （ii） the radiation has frequencies close to the local plasma frequency and/or its second harmonic in the source region. We feel strongly that it is time to advocate an alternative approach without recourse to the plasma hypothesis. This brief discus- sion explains why.

关 键 词：太阳能 射电爆发 Langmuir波 等离子体频率 辐射频率 二次谐波 物理学 无线电 

分 类 号：P353.7[天文地球—空间物理学]