Title: Solar Activities, Heliospheric Magnetic Fields and Space Weather in Astrophysical Contexts 

　　Speaker: Professor Yu-Qing Lou (楼宇庆)

　　          Physics Department, Tsinghua University 清华大学物理系

            　Tsinghua Center for Astrophysics 清华天体物理中心

          　　Tsinghua-NAOC joint Research Center for Astrophysics 清华-国家天文台联合天体物理研究中心

　　Abstract: The grandiose heliosphere is primarily shaped and controlled by the tenuous magnetized solar wind and the orbital motion of our solar system. Solar magnetic activities are the main drivers in the insterstellar space and create dynamic, sometimes disastrous, space weather conditions. There are many legendary stories of human pursuits. We describe physical scenarios and concepts of solar oscillations, magnetohydrodynamic (MHD) fluctuations in the magnetized spiral solar winds, magnetic reconnections, energetic particle acceleration processes, influences on cosmic rays and so forth. Among many missions, the space exploration of Ulysses spacecraft revealed several important properties of magnetized interstellar space environment at high latitudes and the dynamic interaction of the variable solar wind speed with the Jupiter's magnetosphere and inner radiation belt. Physical insights thus gained will be discussed in astrophysical contexts by examples.

　　Time: 10:15 am, Mar.27th (Friday) 

　　Place: Room 212, Astronomy Building, Xianlin Campus 

欢迎各位老师、同学参加！

　                                     　南京大学天文与空间科学学院