Lithium in halo stars from standard stellar evolution

Details Lithium in halo stars from standard stellar evolution Lithium in halo stars from standard stellar evolution

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apjs...73...21d&link_type=abstract

Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 73, May 1990, p. 21-65.

Astronomy and Astrophysics

Astrophysics

212

Lithium, Metallicity, Nuclear Fusion, Stellar Composition, Stellar Evolution, Astronomical Models, Color-Magnitude Diagram, Nuclear Astrophysics, Pre-Main Sequence Stars, Stellar Interiors, Stellar Mass

Scientific paper

A grid has been constructed of theoretical evolution sequences of models for low-metallicity stars from the premain-sequence to the giant branch phases. The grid is used to study the history of surface Li abundance during standard stellar evolution. The Li-7 observations of halo stars by Spite and Spite (1982) and subsequent observations are synthesized to separate the halo stars by age. The theory of surface Li abundance is illustrated by following the evolution of a reference halo star model from the contracting fully convective premain sequence to the giant branch phase. The theoretical models are compared with observed Li abundances. The results show that the halo star lithium abundances can be explained in the context of standard stellar evolution theory using completely standard assumptions and physics.

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