报告题目：Revealing the Origin of Cosmic-rays in the Galactic Center

　　报告人：Dr. Shuo Zhang Massachusetts Institute of Technology

　　报告摘要：The origin of Galactic cosmic-rays has remained one of the biggest puzzles in Astronomy for decades. The cosmic-ray population in the Galactic center can be indirectly probed in the radio, X-ray and gamma-ray windows. A unique type of source in the Galactic center, the radio/X-ray magnetic filaments, may serve as good probes for GeV/TeV electrons. Meanwhile, the X-ray/gamma-ray emission from molecular clouds in the inner hundreds of parsecs can put a tight constraint on the MeV-GeV, and even PeV cosmic-ray particles. In this talk,I am going to unfold the roles of the magnetic filaments and the molecular clouds in revealing the origin of cosmic-ray particles in the inner Galaxy. I will also introduce an exciting opportunity to put the first constraints on MeV-GeV cosmic-rays using the molecular cloud Sgr B2 in 2017

　　报告地点：紫台619会议室

　　报告时间：6月14日（星期三）上午9:30

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　                                              　紫金山天文台学术委员会