Volume 512, March-April 2010
|Number of page(s)||4|
|Published online||19 March 2010|
Letter to the Editor
Higher depletion of lithium in planet host stars: no age and mass effect
Centro de Astrofísica, Universidade do Porto, Rua das Estrelas, 4150-762 Porto, Portugal e-mail: firstname.lastname@example.org
2 Instituto de Astrofísica de Canarias, 38200 La Laguna, Tenerife, Spain
3 Centro de Física Computacional, Universidade de Coimbra, Coimbra, Portugal
4 Observatório Astronómico e Departamento de Matemática, Universidade de Coimbra, Coimbra, Portugal
5 Departamento de Astrofisica, Universidade de La Laguna, 38205 La Laguna, Tenerife, Spain
Accepted: 27 February 2010
Recent observational work by Israelian et al. has shown that sun-like planet host stars in the temperature range 700 K < Teff < 5850 K have lithium abundances that are significantly lower than those observed for “single” field stars. In this letter we use stellar evolutionary models to show that differences in stellar mass and age are not responsible for the observed correlation. This result, along with the finding of Israelian et al., strongly suggest that the observed lithium difference is likely linked to some process related to the formation and evolution of planetary systems.
Key words: stars: evolution / stars: fundamental parameters / stars: abundances / stars: chemically peculiar / planetary systems
© ESO, 2010
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