Kavli Affiliate: Subo Dong
| First 5 Authors: Jinxiao Qin, Hong-Liang Yan, Wenyuan Cui, Jian-Rong Shi, Subo Dong
| Summary:
Whether the presence of planets affects the lithium (Li) abundance of their
host stars is still an open question. To investigate the difference of the Li
abundance between planet-host stars (HS) and isolated stars (IS) with no
detected planets, we analyze a large sample of stars with temperatures ranging
from 4600 to 6600 K and metallicity ranging from -0.55 to +0.50. The sample
consists of 279 HS whose spectra were taken from the California-Kepler Survey
(CKS), which followed up planets detected by Kepler, and 171 IS whose spectra
were taken from the Keck archive. The non-local thermodynamic equilibrium
(non-LTE) effects were taken into consideration. It is found that the
distribution of Li abundances in both the HS and IS groups are generally
consistent with each other. This suggests that the presence of Kepler-like
planets does not have a significant impact on Li depletion. We also found that
the non-LTE corrections can not be neglected for stars with A(Li) over ~ 2.5
dex.
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