时间：10月30日（周三）下午16:00

地点：1429会议室

报告题目：Observation of the Solar Polar Magnetic Field

报告摘要：The magnetic field of the solar polar region expands and permeates the heliosphere. Its mean strength approximates the global poloidal field, which strongly affects the solar wind structure and correlates well with the magnitude of the upcoming activity cycle. High-resolution data unveiled small, kilo-gauss flux patches populating the entire polar region. Their exact nature, however, remains poorly understood due to unfavorable viewing angle from the ecliptic. In this talk, I will review historic and recent development regarding polar field observation, with a focus on the "open flux problem". I will discuss possible breakthroughs from the upcoming Danial K Inoue Solar Telescope (DKIST) and future satellites with out-pf-ecliptic orbits.

报告人简介：Xudong Sun is an Assistant Professor at the Institute for Astronomy, University of Hawaiʻi at Mānoa. He holds a PhD degree in Physics from Stanford University and a BS degree in Earth and Space Sciences from the University of Science and Technology of China. He is a Science Working Group member of the Daniel K. Inoue Solar Telescope (DKIST) and a Science Team member of the Solar Dynamics Observatory (SDO). He is a recipient of the 2018 National Science Foundation Faculty Early Career Award.