【中国科大寰宇开物天文讲坛】标准宇宙学模型的小尺度难题与矮星系的结构多样性 （北京大学 姜方周）

glob3d

完整报告视频回放链接：https://www.koushare.com/space/329298/live中国科大寰宇开物天文讲坛致力于为广大天文科研工作者与关注天文研究进展的人们提供一个学术交流与天文知识传播的平台。“寰宇开物”寓意为力求通晓宇宙中万物——这是天文学研究的不懈追求。The Universe, Yours to Discover!

ghj88

由AI为您生成视频总结：
北京大学姜方舟教授讲解了自相互作用暗物质的相关知识，分析了标准宇宙学模型Lambda-CDM在处理小尺度问题时遇到的困难，特别是涉及矮星系的多样性。讲座还深入探讨了暗物质如何塑造星系结构，指出了该模型无法完美解释的现象，例如星系规模多样性、卫星星系不足、旋转曲线复杂度等问题。

cityboy

个人简介：Dr. Fangzhou Jiang is an assistant professor at the Kavli Institute for Astronomy and Astrophysics, Peking University. He obtained his PhD from Yale University in 2016, and was a PBC Fellow in the Hebrew University of Jerusalem from 2016 to 2019, a Troesh Scholar at Caltech with a jointly appointed Theory Fellow at the Carnegie Observatories from 2020 to 2022, before joining KIAA in 2023. Fangzhou carries out theoretical and computational studies of galaxies and cosmology. His research programs aim at a comprehensive theoretical picture of dark-matter halos and their interplay with inhabitant galaxies across the history of the Universe, with the ultimate goal being to constrain the properties of dark matter and to understand galaxy evolution all the way from the cosmological large scales down to sub-galactic small scales.

tanxiao

报告人：姜方周
题目：The small-scale puzzles of ΛCDM and structural diversity of dwarf galaxies
摘要：The ΛCDM paradigm of structure formation is successful on cosmological large scales but confronts challenges on sub-galactic small scales, regarding the number count, the internal structure, and the spatial distributions of dwarf galaxies and satellite galaxies. In this talk, I present semi-analytical and numerical efforts in quantifying these small-scale puzzles, within the concordance cosmology and in an alternative cosmology consisting of self-interacting dark matter. I discuss frontier trial solutions in the baryonic sector and in the dark sector and compare their pros and cons.