PMO OpenIR  > 太阳活动的多波段观测研究团组
Model for solar radio pulsations at short centimetric band
Huang, GL ; Qin, ZH ; Yao, QJ
1996
Source PublicationAstrophysics and Space Science
ISSN0004-640X
Volume243Issue:2Pages:401—412
AbstractIn this paper, the observed solar radio pulsations during the bursts at 9.375 GHz are considered to be excited by some plasma instability. Under the condition of the conservation of energy in the wave-particle interaction, the saturation time of plasma instabilities is inversely proportional to the initial radiation intensity, which may explain why the repetition rate of the pulsations is directly proportional to the radio burst flux at 9.375 GHz as well as 15 GHz and 22 GHz. It is also predicted that the energy released in an individual pulse increases with increasing the flux of radio bursts, the modularity of the pulsations decreases with increasing the flux of radio bursts, these predictions are consistent with the statistical results at 9.375 GHz in different events. The energy density of the non-thermal particles in these events is estimated from the properties of pulsation. For the typical values of the ambient plasma density (10(9) cm(-3)) and the ratio between the nonthermal and ambient electrons (10(-4)), the order of magnitude of the energy density and the average energy of the nonthermal electrons is 10(-4) erg/cm(3) and 10 kev, respectively. It is interesting that there are two branches in a statistical relation between the repetition rate and the radio burst flux in a special event on March 11-17, 1989, which just corresponds to two different orders of magnitude for the 'quasi-quantized' energy released in these five bursts. This result may be explained by the different ratios between the thermal and the nonthermal radiations.
Subject AreaAstronomy & Astrophysics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/8442
Collection太阳活动的多波段观测研究团组
Recommended Citation
GB/T 7714
Huang, GL,Qin, ZH,Yao, QJ. Model for solar radio pulsations at short centimetric band[J]. Astrophysics and Space Science,1996,243(2):401—412.
APA Huang, GL,Qin, ZH,&Yao, QJ.(1996).Model for solar radio pulsations at short centimetric band.Astrophysics and Space Science,243(2),401—412.
MLA Huang, GL,et al."Model for solar radio pulsations at short centimetric band".Astrophysics and Space Science 243.2(1996):401—412.
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