SIMBAD references

2022ApJ...929L..14Y - Astrophys. J., 929, L14-L14 (2022/April-2)

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

YAN T.-S., SHI J.-R., WANG L., YAN H.-L., ZHOU Z.-M., ZHOU Y.-T., FANG X.-S., LI C.-Q., CHEN T.-Y. and XIE X.-J.

Abstract (from CDS):

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 s–1, which suggests that the accretion of circumstellar matter may be the main contributor to the lithium enhancement of these unevolved stars; however, other sources cannot be excluded.

Abstract Copyright: © 2022. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Chemically peculiar stars - Lithium stars - Circumstellar matter - Stellar rotation

Simbad objects: 17

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