报告题目：A fading particle accelerator for multi-TeV emissions in the Galactic Center

　　报告人：柳若愚（Max Planck Institute for Nuclear Physics, Heidelberg）

　　报告摘要: Diffuse TeV emissions has been discovered surrounding the Galactic center out to a radius of 200pc. The spectrum is consistent with a power-law spectrum up to tens of TeV without a break or a cutoff. Such discoveries suggest a hadronic origin of the diffuse emissions, and imply a petaelectronvolt proton accelerator inside the inner ~10pc region of the GC. On the other hand, the point source HESS J1745?290 inside the 10pc region shows a cutoff in the spectrum around 10TeV. In this talk, I will firstly review the observations of the entire GC region by HESS, and then discuss the possiblity of explaining the spectra of HESS1745-290 and CMZ simultaneously by a fading particle accelerator inside the inner 10pc region of the GC.

　　报告时间：2017年6月14日（星期三）下午 15:30

　　报告地点：紫台大楼517会议室

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　　                                                紫金山天文台学术委员会