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Lithium and beryllium in solar twins
Author(s) -
Meléndez Jorge
Publication year - 2020
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.202013755
Subject(s) - metallicity , beryllium , lithium (medication) , stars , astrophysics , physics , planet , exoplanet , solar mass , spectral line , astronomy , nuclear physics , medicine , endocrinology
Solar twins are stars with a mass and chemical composition similar to the Sun; therefore, they follow about the same evolution and can be used to study the past and future of the Sun. I review the evolution of lithium and beryllium in solar‐mass solar‐metallicity main sequence stars, using a differential spectroscopic analysis of solar twins relative to the Sun, allowing precise determination of stellar ages thanks to the precise stellar parameters ( T eff , log g , [Fe/H]) achieved with high‐resolution high S / N spectra. There is a clear trend of lithium depletion with increasing ages, while beryllium is only slightly depleted, suggesting a relatively shallow extra‐mixing in Sun‐like stars. I also discuss the possible connection between lithium and planets. Finally, I review lithium and beryllium in binary solar analogs with mass‐transfer events (“blue lurkers”).