[Seminar]

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Title: From MHD Waves to Ellerman Bombs: Where are we now with solving the coronal heating problem 

Speaker: Robertus Erdelyi

Affiliation: Solar Physics and Space Plasma Research Centre (SP2RC), University of Sheffield, UK 

Time: Nov 26, 2014(Wednesday) 9:00 a.m.

　　Venue: Meeting Room (Adminstration Building, first floor) 

　　Abstract:  

　　     MHD wave theory predicts at least three distinct eigen-solutions in uniform and magnetised plasmas. However, space (Hinode, SDO, IRIS) and ground-based (DST/ROSA, IBIS, CoMP, SST/CRISP) observations have provided plenty of compelling evidence of various waves present in the highly non-uniform and structured solar atmosphere. The detection and analysis of these waves are challenges on their own. Identification is very hard and often debated. First, I'll summarise the recent advances in MHD wave theory providing a wide range of visualisation that helps us in the wave identification. In particular, I'll discuss the so-called sausage and kink magneto-acoustic waves, and the much sought-after Alfven waves. Importantly, an accurate understanding of these waves allows us to perform sub-resolution solar magneto-seismology (SMS).Next, I will concentrate on the role of the various MHD waves, and will discuss the latest status on detecting them in a range of solar waveguides (sunspots, pores, magnetic bright points, coronal loops and even Ellerman bombs). Within the framework of MHD, I will discuss the origin and generation mechanism of these waves. Finally, I will embark on showing how MHD waves help us to diagnose the solar plasma and may bring us closer to solving the century-old solar atmospheric heating enigma. 

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　　                                                                                                                                       太阳物理研究团组 

　　                                                                                                                              中国科学院天体结构与演化重点实验室 

　　                                                                                                                                      云南天文台学术委员会 

                                                                                                                                                2014-11-25