Discovery of Nine Super Li-rich Unevolved Stars from the LAMOST Survey

  title={Discovery of Nine Super Li-rich Unevolved Stars from the LAMOST Survey},
  author={Tai-Sheng Yan and J.-R. Shi and L. Wang and H. L. Yan and Z.-M. Zhou and Y.-T. Zhou and Xiang-Song Fang and C.-Q. Li and T.-Y. Chen and Xiaojia Xie},
  journal={The Astrophysical Journal Letters},
Based on the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) medium-resolution spectroscopic survey (MRS), we report the discovery of nine super Li-rich unevolved stars with A(Li) > 3.8 dex. These objects show unusually high levels of lithium abundances, up to three times higher than the meteoritic value of 3.3 dex, which indicates that they must have experienced a history of lithium enrichment. It is found that seven of our program stars are fast rotators with v sin i > 9 km… 


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