国台学术报告2023年 第29次
NAOC Colloquium No.29 2023
| 报告题目/Title： | The magnetohydrodynamic orchestra of the corona of the Sun / 太阳日冕的磁流体动力学 |
| 报告人/Speaker： | Prof. Valery M Nakariakov (University of Warwick, United Kingdom) |
| 报告时间/Time： | Wednesday, 2:30 PM, Dec.6, 2023 |
| 报告地点/Location： | NAOC A601 & Live Streaming on NAOC WeChat Channel |
| 主持人/Host： | Prof. Guiping Zhou / 周桂萍 (NAOC) |
| 报告语言/Language： | English/英文 |
| 报告海报/Poster： | |
| 演示幻灯片/Slides： | Click to view the details (later) |
| 报告视频/Video： | Click to watch the video (later) |
| 直播链接/Live Webcast： | 国台微信公众号视频号 (微信扫描如下二维码） |
| 报告摘要/Abstract： | |
| The corona of the Sun is the outermost part of the solar atmosphere. The corona consists of a hot, fully ionised plasma dominated by the magnetic field. One of the most fascinated discoveries made with high-precision spaceborne imaging telescopes operating in the extreme UV band is the ubiquitous dynamics of the corona in a form of various large-scale wave motions. An example of such an instrument is the Extreme UV Imager on the recently launched Solar Orbiter spacecraft. The typical oscillation periods are several minutes, typical wavelengths are tens to hundred thousand kilometres, and typical speeds are from several tens to several thousand kilometres per second, which make the solar coronal waves the largest wave motions resolved simultaneously in time and space, detected in the Universe. Specific properties of various wave and oscillatory processes are determined by parameters of the coronal plasma non-uniformities which support them, acting together as an orchestra consisting of various music instruments. In the talk we shall discuss most typical kinds of solar coronal oscillations, their interpretation in terms of the magnetohydrodynamic theory, and the diagnostics of the coronal plasma by the method of magnetohydrodynamic seismology. | |
| 报告人介绍/Bio: | |
| Professor Valery M Nakariakov graduated from the School of Radiophysics of Lobachevsky’s Gorky State University, USSR in 1989, and gained PhD in Plasma Physics at the Applied Physics Institute of the Russian Academy of Sciences in 1994. In 1995-1999, he was a postdoc at St Andrews, UK, and since 1999 he has a permanent academic position (Full Professor since 2007) at the University of Warwick, UK. His main research interests relate to the observational study and theoretical modelling of magnetohydrodynamic (MHD) wave process in the corona of the Sun, in particular, coronal plasma diagnostics by MHD waves, plasma astrophysics and radiophysics. For the development of the method of MHD seismology Nakariakov was granted a Payne-Gaposchkin Medal and Prize. In 2011-2014 Nakariakov was President of the Solar Physics Division of the European Physical Society. | |
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