Title: Exploring The Milky Way with LAMOST survey

Speaker: Chao Liu, National Astronomical Observatories, Chinese Academy of Science

Host: Weimin Gu

Time: 14:30-16:30, Thursday,  Nov. 26 2020

Location: Physics Building 552

Abstract

LAMOST survey is a spectroscopic survey started since 2011. Until 2020, 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 firstly briefly introduce the LAMOST telescope, and then highlight some interesting results came out of LAMOST data. After a few years of systematic studies, LAMOST has played an important role in better understanding the Milky Way, especially in the outskirt of the disk and halo. In the meantime, LAMOST has contributed quite a few catalogs of many interesting stars, such as young stars, white dwarfs, binary stars, hot sub-dwarfs, hypervelocity stars etc. These samples provide a solid databases for further studies in stellar evolution and relevant fields. In the final part of the talk, I will briefly introduce the on-going LAMOST medium-resolution survey (MRS).

Biography

I am a staff member of the National Astronomical Observatories, CAS, since the end of 2011. I obtained my PhD degree in 2008 at NAOC. Then I went to Max-Planck Institute for Astronomy and worked in Gaia mission as a postdoc for more than 3 years. After I join NAOC, I have been engaging in the stellar and Galactic studies with LAMOST survey data. Currently, I am leading the development of the CSST data processing and analysis software.