Claudia Aguilera

On Lithium-rich Red Giants. I. Engulfment of Substellar Companions.

Aguilera-Gómez, C., Chanamé, J., Pinsonneault, M. H. & Carlberg, J. K.

2016, ApJ, 829, 127

https://ui.adsabs.harvard.edu/abs/2016ApJ…829..127A/abstract

In this work, we model the accretion of a substellar mass companions by different stars. Our models indicate that the accretion of a substellar companion can explain abundances up to A(Li) ≈ 2.2, setting an upper limit for Li-rich giants formed by this mechanism. Additionally, we show that depending on the stellar mass range, this traditional definition of Li-rich giants is misleading, as isolated massive stars would be considered anomalous while giants engulfing a companion would be set aside, flagged as normal. 

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