国台学术报告2023年 第23次
NAOC Colloquium No.23 2023
| 报告题目/Title： | Reevaluation of the Dynamical masses of Local Group galaxies / 再评估本星系群星系的动力学质量 |
| 报告人/Speaker： | Prof. Francois Hammer (Paris Observatory) |
| 报告时间/Time： | Wednesday 2:30 PM, Oct. 25, 2023 |
| 报告地点/Location： | NAOC A601 & Live Streaming on NAOC WeChat Channel |
| 主持人/Host： | Prof. Gongbo Zhao / 赵公博 (NAOC) |
| 报告语言/Language： | English/英文 |
| 报告海报/Poster： | |
| 演示幻灯片/Slides： | Click to view the details (later) |
| 报告视频/Video： | Click to watch the video (later) |
| 直播链接/Live Webcast： | 国台微信公众号视频号 (微信扫描如下二维码） |
| 报告摘要/Abstract： | |
| He will review the recent progresses that their Sino-French team has made using Gaia DR3 data. It includes the detection of a significant (Keplerian) decrease for the rotation curve of our Galaxy, and the fact that most Milky Way dwarfs are newcomers in the halo (as we already know for the Magellanic Clouds). Both discoveries lead to a considerable, downwards revision of the dynamical masses of Local Group galaxies, which will be presented. Finally, he'll discuss consequences on cosmological models, as well as new observational hints that constrain the mass of dwarf irregular galaxies, such as WLM and the Large Magellanic Cloud. | |
| 报告人介绍/Bio: | |
| Prof. Francois Hammer is an astronomer at the Paris-Observatory, co-leading the Sino-French collaboration Tianguan in astronomy and astrophysics with Profs Xiang-Ping Wu and Bertrand Cordier. Francois Hammer studied at the Ecole centrale des arts et manufactures (1980-82), and obtained his PhD in astrophysics in 1986 at the Universite Paris-Diderot. He has made several discoveries in the fields of gravitational lensing, cosmology and galaxy formation and structure. He won prize Descartes-Huyghens from the French and Netherlands Academies of Sciences in 2012, and won the CNRS bronze medal in 1987. He was responsible of the Giraffe spectrograph implemented in 2002 at the Very Large Telescope (VLT), and was one of the four investigators of the X-shooter spectrograph, implemented in 2009 at the VLT. He was the founding Director of GEPI at Paris Observatory (2001-2010), and the founding Principal Investigator of MOSAIC (2014-2020), which is the multi-object spectrograph of the European ELT. | |
| 直播二维码： | |
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