Bibcode
Beckman, J. E.
Bibliographical reference
In: Primordial nucleosynthesis and evolution of early universe; Proceedings of the International Conference, Tokyo, Japan, Sept. 4-8, 1990 (A93-17626 05-90), p. 23-37.
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1991
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Description
The evidence bearing on the derivation of the primordial Li-7 abundance
is summarized from observations of extremely metal-deficient stars in
the galactic halo (Population II). Arguments, primarily observational,
but supported theoretically, are presented to show that the Li-7
observed in warm halo subdwarfs has neither been supplemented by Li-7
production in the early galaxy, nor significantly depleted during the
lifetime of the stars themselves, and gives a good approximation to the
primordial value. The absence of Be-9 or B-10 + B-11 in these objects at
present limits of observational accuracy tends to support the
primordiality of their Li-7. Observing Be-9, and heavier nuclides in the
most metal deficient stars, does offer a possible route to distinguish
between standard and inhomogeneous primordial cosmological models.