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Age and mass determination of solar twins constrained by lithium abundance

Matthieu Castro
Universidade Federal do Rio Grande do Norte, Natal, Brazil

Abstract
Non-standard mixing is required to explain the low Li abundances observed in solar twins. Li depletion due to additional mixing in solar twins is strongly mass dependent. Thanks to a complete grid of models using non-standard additional mixing below the convective zone and an accurate lithium abundance measurement, we are able to provide a precise mass and age determination of solar twins. We applied this method with solar twins of the field (HIP 55459, HIP 79672, HIP 56948, HIP 73815, and HIP 100963) and belonging to the open cluster M67.

2011 January 27, 13:30

IA/U.Porto
Centro de Astrofísica da Universidade do Porto (Auditorium)
Rua das Estrelas, 4150-762 Porto

Instituto de Astrofísica e Ciências do Espaço Universidade do Porto Faculdade de Ciências da Universidade de Lisboa
Fundação para a Ciência e a Tecnologia COMPETE 2020 PORTUGAL 2020 União Europeia