【学术报告】 ～～～～～～～～～～～～～～～～Report Title: Face to Face with Solar Flare: A Journey Through the Sun's Magnetic Field

Speaker: Prof. Yuan Ding (Ph.D., Professor, Doctoral Supervisor)

Institution: Harbin Institute of Technology (Shenzhen)

Language: Chinese

Date and Time: 2023-05-30, Tuesday, 11am - 12pm

Location: Room 502, Building No.1

Abstract:

As we delve into the mysteries of solar flares and their impact on our planet's climate, two prevailing theories—magnetic reconnection and magnetic fluid waves—present unique challenges for current research. While magnetic reconnection offers a high-energy solution in theory, its spatial and temporal scales are beyond the reach of existing ground-based telescopes. On the other hand, magnetic fluid waves offer a larger spatial scale but lower energy release rates that fail to meet the energy requirements for solar flare heating.

This study presents groundbreaking observations from Goode Solar Telescope at Big Bear Solar Observatory that reveal previously unknown horizontal oscillations within sunspots' penumbrae fibers. These oscillations trigger persistent lateral field fluctuations with no significant decay over time. Using advanced magnetohydrodynamic numerical simulations and theoretical calculations based on these findings, we demonstrate an extraordinary energy flow rate of approximately $7.52 \times 10^6$ W/m² in this region—a mere fraction of which would be sufficient to power solar flare heating.

Our research explores new avenues for understanding solar flares through large ground-based telescopes like those at China's Yunnan Observatory (http://www.ynao.cas.cn/xwzx/xstg/) while also shedding light on long-standing questions about energy transfer between chromosphere layers during intense events such as coronal mass ejections or X-ray bursts.

For further information regarding academic report management guidelines visit http://www.ynao.cas.cn/xwzx/xstg/gzzd/. Contact Professors Qu Zhongquan or Deng Linhua for inquiries related to organizing future events under FASOT Research Team or Yunnan Astronomical Society Youth Promotion Group initiatives.

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云台邀请团组：FASOT研究团组、云南天文台青促会小组

邀请方联系人：屈中权、邓林华

5月26日