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Centro de Astrofísica da Universidade do Porto

The solar, exoplanet and cosmological lithium problems

J. Meléndez, I. Ramírez, L. Casagrande, M. Asplund, B. Gustafsson, D. Yong, J. D. do Nascimento Jr., M. Castro, M. Bazot

Abstract
We review three Li problems. First, the Li problem in the Sun, for which some previous studies have argued that it may be Li-poor compared to other Suns. Second, we discuss the Li problem in planet hosting stars, which are claimed to be Li-poor when compared to field stars. Third, we discuss the cosmological Li problem, i.e. the discrepancy between the Li abundance in metal-poor stars (Spite plateau stars) and the predictions from standard Big Bang Nucleosynthesis. In all three cases we find that the “problems” are naturally explained by non-standard mixing in stars.

Keywords
Sun - Solar twins - Exoplanets - Metal-poor stars - Big bang nucleosynthesis

Notes
AX = log(NX/NH) + 12

Astrophysics and Space Science
Volume 328, Page 193
July 2010

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