SOLAR TYPE III RADIO BURSTS MODULATED BY HOMOCHROMOUS ALFVEN WAVES

作者：Zhao, G. Q.^*; Chen, L.; Wu, D. J.

来源：Astrophysical Journal, 2013, 779(1): 31.

DOI：10.1088/0004-637X/779/1/31

• plasmas
• radiation mechanism: non-thermal
• Sun: radio radiation

Solar type III radio bursts and their production mechanisms have been intensively studied in both theory and observation and are believed to be the most important signatures of electron acceleration in active regions. Recently, Wu et al. proposed that the electron-cyclotron maser emission (ECME) driven by an energetic electron beam could be responsible for producing type III bursts and pointed out that turbulent Alfven waves can greatly influence the basic process of ECME via the oscillation of these electrons in the wave fields. This paper investigates effects of homochromous Alfven waves (HAWs) on ECME driven by electron beams. Our results show that the growth rate of the O-mode wave will be significantly modulated by HAWs. We also discuss possible application to the formation of fine structures in type III bursts, such as so-called solar type IIIb radio bursts.

• 出版日期2013-12-10
• 单位中国科学院大学; 中国科学院紫金山天文台