【直播】【北大天文学术报告】上海交通大学李兆聿：银震学时代的相空间结构研究

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本系列报告由北京大学科维理天文与天体物理研究所、北京大学天文学系主办，于2021年7月22日16:00开始，授权蔻享学术进行网络直播。

银震学时代的相空间结构研究

报告人

李兆聿（上海交通大学）

时间

2021年7月22日 16:00

Gaia first discovered the snail shell structure in the Z-Vz phase space of stars in the Milky Way disk, suggesting that the disk was perturbed and dynamically young. This represents the beginning of a new promising research field, i.e., ‘Galactoseismology’, where we can study the Galactic structure formation and evolution history using the phase space signals. 

In this talk, I will first introduce the physical background of the phase space snail shell. Then I will describe our recent works related to such phenomenon: 1) we found that the phase snail can only be seen in dynamically colder orbits; 2) the phase snail is more prominent when the stars are grouped into different guiding radius; 3) the vertical potential profiles could be constructed based on the phase snail.

报告人介绍

图 | 李兆聿
2002-2006, B.S., Peking University2006-2011, Ph.D., Peking University, thesis advisor (Luis Ho, Xuebing Wu)2011-2013, Postdoc, Shanghai Astronomical Observatory2013-2019, Associate Research Fellow, Shanghai Astronomical Observatory2019-present, Assistant professor, Shanghai Jiao Tong University

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