报告讲座
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格物致理第99期：GRB afterglows: particle acceleration, emission, and hydrodynamic evolution
Gamma-Ray Bursts are produced by stellar explosions that channel part of their energy into ultrarelativistic jets. Plunging into curcumburst medium,these jets form relativistic shocks, whose prolonged emission is known as GRB afterglow. This emission is a combination of synchrotron and inverse Compton radiation from accelerated electrons.
发布者： 发布时间：2025-09-17 14:43:32 -
格物致理讲坛 第98期 ：Constraining Quintessence Models with ISW–tSZ Cross-Correlations: Thawing, Tracker, and Scaling-Freezing Dynamics in the Context of Stellar Feedback and Cosmic Ray Propagation
Constraining Quintessence Models with ISW–tSZ Cross-Correlations: Thawing, Tracker, and Scaling-Freezing Dynamics in the Context of Stellar Feedback and Cosmic Ray Propagation
发布者： 发布时间：2025-09-19 15:42:22 -
格物致理第97期：超高能弥散伽马射线观测和模型研究
弥散伽马射线一般认为产生于宇宙线和星际介质的相互作用，因此是研究宇宙线分布和传播模型的重要探针。TeV以上能段的弥散伽马射线需要地面实验测量，受限于灵敏度而长期以来精度不高。我国建造的高海拔宇宙线观测站LHAASO以其超宽能段覆盖和超高观测灵敏度，显著地改善了这一局面。本报告将介绍拉索对TeV-PeV能段银盘弥散伽马辐射的精确测量以及对观测结果的可能物理解释。
发布者： 发布时间：2025-09-03 14:02:30 -
格物致理第96期：暗物质间接探测及甚大面积伽马射线空间望远镜
暗物质的物理本质属性是国际重大科学前沿。一种常用的研究手段是间接探测，就是在伽马射线和宇宙线数据中去证认暗物质湮灭或衰变的产物。我将介绍悟空号卫星项目以及国内外试验在暗物质间接探测方面所发现的部分候选信号，最后将介绍紫金山天文台等单位正在协同推进的甚大面积伽马射线空间望远镜计划。
发布者： 发布时间：2025-07-26 15:06:24 -
格物致理第95期：The frontiers of Circum-Galactic Mediums
Circum-Galactic Medium (CGMs) are multi-phases, key to understand the galaxy ecosystem and its accretion and feedback. Mapping the circumgalactic medium (CGM) in emission is one of the important scientific goals for astronomers to either use the modern ground-based telescopes or the future space missions. In this talk, I will overview the frontiers of CGMs, emphasizing the warm-hot phase, which is believed to be the baryons reservoir of the missing baryons. I also overview the related observation strategies in the world as well as some explorations in China. I I will highlight the prospects in CGM fields based on the existing and future facilities (such as SMILE, CSST, CAFÉ, HUBS etc.) in China.
发布者： 发布时间：2025-07-26 14:52:08 -
格物致理86期：Particle-In-Cell Simulation on Astrophysical Plasmas
Particle-In-Cell (PIC) simulation is a powerful tool to study plasma kinetics. In this talk, I will show applying PIC method on the problems of astrophysical plasmas.
发布者： 发布时间：2025-05-22 09:23:58