Revisiting the Li Abundances of Stars with and without Detected Planets from High-resolution Spectroscopy

Abstract Whether the presence of planets affects the lithium (Li) abundance of their host stars is still an open question. To investigate the difference in the Li abundance between planet-host stars (HSs) and isolated stars (ISs) 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 HSs whose spectra were taken from the California-Kepler Survey, which followed up planets detected by Kepler, and 171 ISs 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 distributions 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 cannot be neglected for stars with A(Li) over ∼2.5 dex.

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Publication Details

Journal
The Astrophysical Journal
Published
2025-06-17
DOI
https://doi.org/10.3847/1538-4357/addac3
Primary Topic
Stellar, planetary, and galactic studies
Type
article
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article

Revisiting the Li Abundances of Stars with and without Detected Planets from High-resolution Spectroscopy

Zhenyan Huo, Ming-Yi Ding, Henggeng Han, Zeming Zhou et al.
2 links
The Astrophysical Journal
Stellar, planetary, and galactic studies
article

Revisiting the Li Abundances of Stars with and without Detected Planets from High-resolution Spectroscopy

Zhenyan Huo, Ming-Yi Ding, Henggeng Han, Zeming Zhou, Subo Dong, Jianrong Shi, Song Wang, Miao Tian, X.-S. Fang, Chunqian Li, Wenyuan Cui, Shuai Liu, Hong-Liang Yan, Jinghua Zhang, Jiaqi Qin
article en

Abstract

Abstract Whether the presence of planets affects the lithium (Li) abundance of their host stars is still an open question. To investigate the difference in the Li abundance between planet-host stars (HSs) and isolated stars (ISs) 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 HSs whose spectra were taken from the California-Kepler Survey, which followed up planets detected by Kepler, and 171 ISs 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 distributions 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 cannot be neglected for stars with A(Li) over ∼2.5 dex.

The Astrophysical JournalVol. 986(2)
Yunnan University (CN), Chinese Academy of Sciences (CN), Peking University (CN), Beijing Normal University (CN), Kavli Institute for Theoretical Sciences (CN), Instituto de Astrofísica de Canarias (ES), National Astronomical Observatories (CN), University of Chinese Academy of Sciences (CN), Hebei Normal University (CN)
Openalex Percentile: Top 91%
Stellar, planetary, and galactic studies
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