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LAMOST——from low-resolution to time-domain spectroscopic survey
报告题目:LAMOST——from low-resolution to time-domain spectroscopic survey
报 告  人:刘超 (国家天文台,中国科学院大学)
报告时间:2020-03-12 16:00:00
报告地点:网络视频会议 https://zoom.com.cn/j/228750200

摘要:LAMOST survey is a spectroscopic survey started since 2011. Until 2019, it has observed over 10 million low-resolution (R~1800) stellar spectra, half of which have stellar parameters been estimated, with limiting magnitude of around r=17.8 mag. With such a large volume of data, we are able to study the structure and evolution of the Milky Way, many interesting stellar objects, and finding stellar size black holes. I will highlight some interesting results came out of LAMOST data in the first part of my talk.

Since 2018, LAMOST survey has started the second stage with upgraded medium-resolution (R~7500) spectrographs. Unlike the low-resolution survey, the medium-resolution survey (MRS) concentrates more on stellar physics, including the evolution of binary stars, variable stars and so on. According to the new scientific goals, MRS becomes a pioneering time-domain medium-resolution spectroscopic survey. When the survey ends in 2023, we expect it will observe more than 200 thousands stars with averagely 50 epochs for each object. I will talk about the details of the science plans, survey strategies, and some preliminary results.

简介:

刘超,中国科学院国家天文台研究员,空间站望远镜科学应用研究团组首席科学家,中国科学院大学岗位教授。2008年于中国科学院国家天文台获得博士学位,2009-2011年在德国马克斯普朗克天文研究所从事博士后研究, 参与欧洲空间局Gaia卫星研制, 负责恒星参数估计算法和数据处理程序的研发。2011年底回到国家天文台。主要从事银河系结构与演化、恒星物理、星际介质等方面的观测研究。现负责中国空间站望远镜的数据处理流水线的研制工作。目前发表论文100多篇,引用超过6000次。