Colloquium on Nov. 28, 2024

Lithium Evolution in the Low-mass Evolved Stars with Kepler Asteroseismology and LAMOST Spectroscopy

Speaker: Hongliang Yan (NAOC)

Venue: SWIFAR Building 2111

Time: 16:00 PM, Thursday, Nov. 28, 2024

Abstract:

Lithium is an ancient element that was first produced by the Big Bang Nucleosynthesis (BBN) a few minutes afterthe birth of the Universe. It is a sensitive tracer for a number of processes in a variety of astrophysical environments due to its multi-channels of production and fragility. These features also make lithium a complexelement at the center of many umsolved problems. It is known that low-mass evolved stars not only destroy but also produce lithium, while neither the destruction details nor the production mechanisms over different evolutionary phases are clear. In this talk, I will summarize the recent results obtained from the studies combining large-scale spectroscopic surveys, asteroseismology, and high-resolution spectroscopy, and discuss some observational and theoretical constraints on lithium production in low-mass evolved stars.

Report PPT:  SWIFAR_Hongliang Yan.pdf