Bibcode
Rebolo, R.; Beckman, J. E.; Molaro, P.
Bibliographical reference
Astronomy and Astrophysics (ISSN 0004-6361), vol. 192, no. 1-2, March 1988, p. 192-205.
Advertised on:
3
1988
Citations
244
Refereed citations
209
Description
New measurements of the lithium abundance in a sample of 37 field dwarfs
of low metallicity (-0.6 ≥ [Fe/H] ≥ 3.2) are presented. Combining
these observations with those in the literature it is shown that
extremely metal-deficient ("EMD") dwarfs ([Fe/H] ≤ -1.4) form a much
more homogeneous population with regard to 7Li abundance than
stars somewhat more metal-rich. The authors consider that these stars
offer the best opportunity to make a reliable measurement of the
primordial Li abundance, which they estimate to be log N(Li) =
2.2(±0.15), a value slightly higher than that given by Spite and
Spite (1982). Using a recent theoretical curve of Li against the
universal baryon to photon ratio, η, from a standard Big Bang model,
and the above cited primordial abundance, η is constrained to the
range 1.2×10-10 ≤ η ≤
8×10-10.