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GodEyes 伽马射线暴统计模拟软件的发展与应用 & Interpretation of anomalies of galactic cosmic rays with spatially dependent propagation model

  报告一:

  报告题目:GodEyes 伽马射线暴统计模拟软件的发展与应用

  报告人:郭义庆 副研究员(中科院高能物理研究所)

  报告摘要:伽马射线暴自发现以来,一直是天体物理领域研究的热点。到目前为止,空间卫星共观测到了8000多个GRB,其中有红移观测的有400多个暴。近年来,随着地面实验深入观测,TeV能区窗口打开,为这一领域带来新的机遇和曙光。我们基于这些实验观测,开发了GRB统计模拟软件GodEyes,期望产生一组完备的GRB样本,这些样本与各类实验观测结果一致,通过这些检验过得样本,我们开展了地面实验LHAASO,HADAR等年探测率预期工作,同时开展了GRB高能辐射对各项同性的河外背景光的贡献研究。

  报告二:

  报告题目:Interpretation of anomalies of galactic cosmic rays with spatially dependent propagation model

  报告人:姚玉华 助理研究员(重庆大学)

  报告摘要:Recent observations of cosmic rays have revealed a two-component spectra anomaly observed across all primary and secondary particles, as well as the connecting ratios within the galactic plane. Our study proposes a syngenetic origin for this phenomenon, suggesting it originates from two diffuse regions. This scenario naturally reproduces all anomalies, except for the positron spectrum. Specifically, the TeV energy break in the electron spectrum represents a transition from diffusion-dominant to energy cooling-dominant effects. Additionally, extending the two-component spectra model to the entire galactic plane allows us to recreate ultra-high energy emissions detected by the ASγ experiment. Our work establishes a clear framework for understanding the formation of galactic cosmic rays. High-energy cosmic rays primarily originate from recent accelerators and remain confined to nearby locations, while low-energy cosmic rays predominantly come from remote sources in the galactic sea. In summary, cosmic rays below 200 GV originate from the galactic sea, while those above 200 GV, including those at the knee position, primarily stem from nearby sources.

  报告时间:2023年8月24日(周四)09:00-09:45、09:45-10:30

  报告地点:仙林园区3-201室

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