中国科学院云南天文台学术报告通知

 2025年第13期

报告题目：First Imaging of Magnetic Waveguides and Resonant Cavities in Sunspots

报告人：Robert Sych教授

报告人单位：Radioastrophysical Department of the Institute of Solar-Terrestrial Physics SB RAS (ISTP) in Irkutsk, Russia

报告语言：英文

报告时间：5月22日（星期四）14:30-15:30

报告地点：一号楼222会议室

报告摘要：

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The wave dynamics associated with the 3-minute periodicity in sunspots is a key phenomenon observed in the solar atmosphere at different wavelengths and atmospheric altitudes. Although these waves are weak in the photosphere, they have the possibility to propagate up to the corona using magnetic field lines as natural waveguides. There are two mechanisms as resonance cavities origin and wave cutoff frequency which can explain wave propagation at different layers of sunspot atmosphere. I will discuss the first EUV/UV imaging of the 3-D structure of magnetic waveguides over the whole height of sunspots with confirmation of the presence of resonance cavities. Their detection is an experimental proof of the theory of resonant layers, previously proposed to explain significant harmonics in sunspot oscillation spectra.

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报告人简介： 

罗伯特·西奇（Prof. Robert Sych）教授是俄罗斯太阳物理领域的杰出专家。他是俄罗斯科学院西伯利亚分院太阳-地球物理研究所（ISTP）射电天体物理部的首席研究员，并曾于2015年至2020年担任该研究所的国际事务副主任。西奇教授从事太阳物理和数值技术研究已超过40年，研究重点包括：本地日震学的应用、太阳磁结构中的磁流体力学（MHD）波和振荡研究、强烈X射线爆发的预报、微波波段中太阳耀斑能量释放过程的诊断、数字谱分析技术的发展、太阳大气中波动过程的三维层析成像与可视化等。这些研究成果中的大部分已在近年来发表。

邀请人：闫晓理

邀请方：抚仙湖太阳观测与研究团组、云南省太阳物理与空间目标监测重点实验室