Colloquium on May. 22, 2025

Research on stellar streams with LAMOST and Gaia

Speaker: Jingkun Zhao (NAOC)

Venue: SWIFAR Building 2111

Time: 16:00 PM, Thursday, May. 22, 2025

Abstract:

Stellar streams, as dynamically coherent remnants of disrupted stellar systems, serve as powerful tracers in Galactic archaeology. They offer insights into the hierarchical assembly history of the Milky Way through past merger events, enable constraints on the gravitational potential and mass distribution of the Galactic halo, probe the substructure mass function of dark matter subhalos, and help identify primordial building blocks associated with ancient globular clusters. In this talk, I will first review recent advances in stellar stream research, particularly those enabled by modern digital sky surveys. I will then present our latest work using data from LAMOST and Gaia, including the detection of new stellar streams, the identification of their member stars, and the analysis of chemical abundance patterns among stream members.