Searching for chemical relics of first stars with LAMOST

Extremely metal-poor (EMP) stars ([Fe/H] < −3.0) are believed to form at the earliest stage of the Galactic chemical evolution. EMP stars are rare, but provide basic information of first stars and supernova, as well as on the nucleosynthesis and chemical enrichment of the very beginning of the Universe. The huge database of LAMOST spectroscopic survey will provide an unprecedented chance to enlarge the EMP star sample and important constraints on the formation of Galactic halo. The talk will briefly outline the properties of EMP stars and introduce our project of searching for EMP stars with LAMOST. Recent progress of this project will be presented, including identifications and investigations of chemically interesting objects such as ultra metal-poor stars with [Fe/H] ~ -4.0, a most extreme example of super Li-rich EMP giant, EMP stars showing extreme overabundance in heavy elements, etc.

Speaker: 
Haining Li (NAOC)
Place: 
KIAA-PKU Auditorium
Host: 
Gregory Herczeg
Time: 
Thursday, October 8, 2015 - 4:00pm