报告题目：哈勃常数危机

　　报告人：张鑫（东北大学，教授）

　　报告人简介：张鑫，东北大学教授、博士生导师，研究领域为宇宙学。在暗能量宇宙学、暴胀宇宙学、中微子物理、引力波天文学、21厘米宇宙学等多个方向长期开展研究工作，在Nature Communications、Physical Review D、European Physical Journal C等国际学术期刊发表论文140余篇，被引用 5500 多次，H 因子40。曾获得国务院政府特殊津贴，入选国家“万人计划”青年拔尖人才、辽宁省“兴辽英才计划”领军人才，并获得国家自然科学基金优秀青年科学基金项目资助。曾获辽宁省自然科学二等奖。担任中国引力与相对论天体物理学会理事、《中国科学：物理学 力学 天文学》和 SCIENCE CHINA Physics, Mechanics & Astronomy编委。

　　摘要：Measuring the Hubble constant has always been an important mission in cosmology. In recent years, the late-universe (local) measurements of the Hubble constant disagree with the prediction made from the standard model of cosmology based on the early-universe observations at the level of about 4-6 standard deviations, which has become a new crisis in cosmology. The Hubble tension implies that some cracks might exist in the present standard model of cosmology, and so new physics is sought for mending the cosmology. In this talk, I will focus on the issue concerning the tensions appeared between the measurements from the early and late universe, in particular the problem of the Hubble tension. I will also discuss the importance of cosmological parameter measurements and outlook the future new cosmological probes.

　　报告时间：2020年7月7日10点（周二）

　　直播地点：zoom id: 356 355 0421

　　或者直接点击https://zoom.com.cn/j/3563550421?pwd=U1BiWFlOL2hWNm9QM1pibi9HeHBxUT09

　　邀请团组：星系宇宙学与暗能量研究

欢迎大家参加！

　　紫金山天文台学术委员会