近日，事件视界望远镜（Event Horizon Telescope，EHT）合作组在全球7地同时发布了我们银河系中心超大质量黑洞的最新结果。李政道学者Yosuke Mizuno（水野陽介）和博士后崔玉竹助力了此次成果的发布。本次成果详见：李政道研究所助力EHT合作组公布银河系中心黑洞的首张照片
图：银河系中心黑洞的首张照片！ （EHT合作组织提供）
这张照片是如何“拍摄”出来的？背后还有哪些有趣的原理与故事？5月18日（周三）18:30李政道前沿讲坛+Colloquim将带你线上揭秘！
回放链接：https://vshare.sjtu.edu.cn/open/2c03a6335894aba9600be485250262cb
报告时间
5月18日（周三）
18:30-19:30 李政道前沿讲坛
20:00-21:00 Colloquium
报告主题
李政道前沿讲坛
First Sgr A* Event Horizon Telecope Results:
The Shadow of the Supermassive Black Hole in the Center of the Milky Way
Colloquium
Testing Astrophysical Models from the Shadow of the Galactic Center Black Hole
主讲人
Yosuke Mizuno（水野陽介）
EHT合作组理论和模拟工作组组长
李政道学者、物理与天文学院长聘教轨副教授
特邀嘉宾
沈志强 Zhiqiang Shen
上海天文台 台长、研究员
张鹏杰 Pengjie Zhang
上海交通大学 特聘教授
何小刚 Xiaogang He
上海交通大学 讲席教授
崔玉竹 Yuzhu Cui
上海交通大学 博士后
讲座概要
李政道前沿讲坛
We present the first Event Horizon Telescope (EHT) observations of Sagittarius A* (Sgr A*), the Galactic center source associated with a supermassive black hole. These observations were conducted in 2017 using a global interferometric array of eight telescopes operating at a wavelength 1.3 mm. A variety of imaging and modeling analyses all support an image that is dominated by a bright, thick ring with a diameter of ~50 micro-arcsecond. Using a large suite of numerical simulations and model comparison, we demonstrate that the EHT images of Sgr A* are consistent with the expected appearance of a Kerr black hole with mass ∼4 million solar mass, which is inferred to exist at this location based on previous infrared observations of individual stellar orbits, as well as maser proper-motion studies. Our results provide direct evidence for the presence of a supermassive black hole at the center of the Milky Way. In this talk, I will compare with two EHT observed black hole shadows, M87 and Sgr A*.
Colloquium
In the colloquium, from the overview of our results in Frontier Lecture, I will focus on more theoretical interpretation and model comparison to understand the accretion flow properties nearby Sgr A*.
参与方式
腾讯会议号：682-920-280