Lithium Abundance as a Predictor of Mass and Age in Solar-analog Stars

Details Lithium Abundance as a Predictor of Mass and Age in Solar-analog Stars Lithium Abundance as a Predictor of Mass and Age in Solar-analog Stars

Feb 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012apj...746..143l&link_type=abstract

The Astrophysical Journal, Volume 746, Issue 2, article id. 143 (2012).

Astronomy and Astrophysics

Astronomy

1

Stars: Abundances, Stars: Evolution, Stars: Rotation, Stars: Solar-Type

Scientific paper

In order to estimate the mass and age of stars, we construct a grid of stellar models for eight solar-analog stars including diffusion and rotation-induced mixing for the given ranges of stellar mass, metallicity, and rotational rate. By combining stellar models with observational data including lithium abundance, we obtain more accurate estimations of mass and age for solar-analog stars. The results indicate that stars HIP 56948, HIP 73815, and HIP 78399 are three possible solar twins. Furthermore, we find that lithium depletion due to extra-mixing in solar analogs strongly depends on mass, metallicity, and rotational history. Therefore, lithium abundance can be used as a good constraint in stellar modeling.

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