Title: Origin and energization of solar explosions

Speaker: Prof. CHENG Xin, Nanjing University

Time: 15:00, July. 17 (Thursday), 2025

Place: Room 666, Building 5

Abstract: 

The most powerful explosive phenomena that occur in the solar atmosphere and then propagate into interplanetary space are solar flares and coronal mass ejections (CMEs), which can give rise to severe impacts on the safety of high-tech human operations in space. To understand and predict these plasma explosions, we need to elucidate some fundamental but still puzzling questions, one of which concerns their origin and energization. I will present the discovery of pre-eruptive hot plasma channels causing solar eruptions and deliver a new MHD model to show how such pre-eruptive structures evolve toward the final eruption. I will also present new observations and simulations of 3D magnetic reconnection during the explosions to understand the underlying energy release mechanism.