2000年7月10日NOAA 9077 AR太阳耀斑软X射线极大值之后的扩展射电辐射
Extended radio emission after the soft X-ray maximum of the NOAA 9077 AR solar flare on July 10, 2000
摘要:
2000年7月10日21:42 UT后,在NOAA 9077活动区,几个观测站探测到了一个扩展的射电辐射。同时,利用北京天文台1.0- 2.0GHz射电频谱仪观测到了射电持久辐射前的一些射电精细结构。我们应用剪切驱动的四极重联模型(SQR)来分析精细结构和相关的射电辐射。我们发现在重联过程中,磁通环的足点剪切运动伴随着磁通环的出现。我们尝试性地将扩展的射电辐射解释为软X射线极大值之后新出现的通量环和先前存在的总体环之间的新的重联过程所引起的非热辐射。
英文摘要:
An extended radio emission after a soft X-ray (SXR) maximum was detected in the active region NOAA 9077 by several observatories for the solar flare after 21:42 UT on July 10, 2000. Also some radio fine structures before the enduring radio emission were observed with the 1.0-2.0 GHz spectrometer of Beijing Astronomical Observatory (BAO) in the same time. We apply a shear-driven quadrupolar reconnection model (SQR) to analyze the fine structures and the related radio emission. We find that the footpoint shear motion of the flux loop is accompanied with the emerging up of the loop during the reconnection process. We tentatively interpret the extended radio emission as the nonthermal radiation caused by a new reconnection process between emerging flux loop and pre-existing overarching loop after the soft X-ray maximum.
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