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arXiv 1406.1202astro-ph.SR
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用ARTEMIS-IV射电频谱仪观测到的米波IV型射电爆发的精细结构:与耀斑和日冕物质抛射的联系

Fine Structure of Metric Type-IV Radio Bursts Observed with the ARTEMIS-IV Radio Spectrograph: Association with Flares and Coronal Mass Ejections

C. Bouratzis, A. Hillaris, C. E. Alissandrakis, P. Preka-Papadema, X. Moussas, C. Caroubalos, P. Tsitsipis, A. Kontogeorgos

摘要:

IV型爆发连续体中的精细结构可以用来诊断与耀斑/CME事件的低日冕发展相关的磁场重构和相应的能量释放。用ARTEMIS-IV太阳射电频谱仪的SAO接收器在450- 270 MHz范围内以高频率(0.01秒)观测到的36个IV型爆发的目录被汇编;精细结构被分为五个基本类,每个基本类有两个或更多的子类。精细结构发射的时间与高能电子注入的HXR和微波发射,SXR光变曲线和CME的起始时间证明了。我们的研究结果表明,一个很好的时间之间的关联能量释放事件和脉动,尖峰,窄带爆发的III型家庭和斑马爆发。在其余的类别中,无特征的宽带连续体开始于第一次能量释放的时间附近,在CME开始和SXR峰值之间,但在那之后延伸了几十分钟,几乎覆盖了耀斑-CME事件的全部范围。与其他精细结构相比,中间漂移爆发(纤维占大多数)主要遵循第一次能量释放,但分布更广。

英文摘要:

Fine structures embedded in type-IV burst continua may be used as diagnostics of the magnetic field restructuring and the corresponding energy release associated with the low corona development of flare/CME events. A catalog of 36 type-IV bursts observed with the SAO receiver of the ARTEMIS-IV solar radio-spectrograph in the 450--270 MHz range at high cadence (0.01 sec) was compiled; the fine structures were classified into five basic classes with two or more sub-classes each. The time of fine structure emission was compared with the injection of energetic electrons as evidenced by HXR and microwave emission, the SXR light-curves and the CME onset time. Our results indicate a very good temporal association between energy release episodes and pulsations, spikes, narrow-band bursts of the type-III family and zebra bursts. Of the remaining categories, the featureless broadband continuum starts near the time of the first energy release, between the CME onset and the SXR peak, but extends for several tens of minutes after that, covering almost the full extent of the flare--CME event. The intermediate drift bursts, fibers in their majority, mostly follow the first energy release but have a wider distribution, compared to other fine structures.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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