2025年第17次学术报告：MICROWAVE DIAGNOSTICS OF FLARE PLASMA BY THE DIRECT FITTING METHOD BASED ON DATA OF THE SIBERIAN RADIOHELIOGRAPH
摘要：
In recent years, the problem of solar flares is especially topical in connection with abrupt jump of spatial, temporal and spectral resolution of ground-based and space solar telescopes. In microwaves, the most known are MUSER, EOVSA, and Siberian Radioheliograph. Of great importance is also the recent development of theory and numerical codes for simulations of high energy electron acceleration, propagation, and radio emission generation.
In this talk, I will show some examples of how we can use these research tools for diagnostics of electrons and plasma parameters in solar flares. First, I’ll demonstrate the main effects which influence the microwave emission characteristics. Then, how these effects allow us to determine spatial, energy, and pitch-angle distributions of accelerated electrons. And finally, how these effects help us measure magnetic field and its dynamics in the radio source of a flare.
报告人简介：
Victor Melnikov obtained the PhD degree at the Radiophysical Research Institute of Lobachevsky University in 1990 (Nizhniy Novgorod, Russia). Currently, he is the Principal Scientist of the Pulkovo Observatory (Saint Petersburg, Russia) as well as a professor of Shandong University. His research interests include radio astronomy, solar and stellar flares, particle acceleration and propagation in solar plasma, radio emission generation and radio diagnostics of solar flares. Victor Melnikov has published 2 books and more than 100 scientific papers in such journals as ApJ, A&A, SpScRev, PhysRevLett, etc.
报告邀请人：沈金花
报告时间：2025年09月11日（周四） 11:00
报告地点：南楼210会议室