Qianyi Ma

ST Solar-Terrestrial Sciences

The 2025 Outstanding Student and PhD candidate Presentation (OSPP) Award is awarded to Qianyi Ma for the poster/PICO entitled:

Multi-spacecraft Observations of Interplanetary Suprathermal Electrons in a Shock-ICME Interaction Region (Ma, Q.; Wang, L.)

Click here to download the poster/PICO file.

Qianyi Ma is a PhD candidate at the School of Earth and Space Sciences, Peking University, and conducts research in the group led by Linghua Wang. Qianyi Ma’s work primarily focuses on the in-situ shock acceleration of interplanetary suprathermal particles, with a particular emphasis on the suprathermal electron acceleration within the shock-interplanetary coronal mass ejection (shock-ICME) interaction region. Additionally, Qianyi Ma has previously investigated the quiescent energy spectra of energetic electrons in the outermost terrestrial radiation belt.

In the poster he presented at EGU25, multi-spacecraft observations were employed to study the local acceleration of suprathermal electrons in a shock-ICME interaction region. Results regarding shock parameters, electron pitch-angle distributions, and acceleration efficiencies demonstrate that these electrons undergo shock drift acceleration, and the acceleration efficiency is dominated by magnetic field strength and shock ramp thickness, rather than the drift electric field strength as suggested by previous studies on typical ICME-driven shocks. This study reveals the complex physical process of electron acceleration in the shock-ICME interaction region.