Li-rich giants serve as valuable tracers of stellar evolution and surface enrichment processes, for which a statistically large and homogeneous sample is crucial. Using the massive low-resolution (R∼1800) spectroscopic dataset from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) survey, we systematically search for Li-rich giants by determining their stellar lithium abundances through template matching of the Li I 6708 {\AA} absorption line with a grid of synthetic spectra generated from ATLAS9 model atmospheres. The derived abundances are validated against previous high-resolution studies, showing good consistency with a mean absolute error of about 0.15 dex. Therefore, we adopt a threshold of A(Li)>1.65 dex to select Li-rich candidates, followed by visual inspection to ensure the reliability of each detection. Eventually, more than 20,000 Li-rich giants are identified, corresponding to approximately 2.5% of all giants in LAMOST DR9. We also investigate the occurrence rate of Li-rich giants in different evolutionary stages. This work presents a large and homogeneous catalog of Li-rich giants derived from the LAMOST low-resolution survey, which provides a reliable and valuable dataset for future studies of stellar evolution and lithium enrichment in evolved stars.
@article{arxiv.2602.22572,
title = {Identify ~20,000 Li-rich Giants in the LAMOST Low-Resolution Survey},
author = {Ming-Yi Ding and Liang Wang and Jian-Rong Shi and Hong-Liang Yan and Chun-Qian Li and Jing Chen and Kai Zhang and Yu-Lu Liang and Zi-Chong Zhang and Xu-Hang Yin and Qin-Yang Dong},
journal= {arXiv preprint arXiv:2602.22572},
year = {2026}
}