Bibcode
Rebolo, R.
Referencia bibliográfica
(Instituto de Astrofisica de Canarias and Comision Interministerial de Ciencia y Tecnologia, Summer School on Evolutionary Phenomena in Galaxies, Puerto de la Cruz, Spain, July 4-15, 1988) Astrophysics and Space Science (ISSN 0004-640X), vol. 157, no. 1-2, July 1989, p. 47-54.
Fecha de publicación:
7
1989
Número de citas
5
Número de citas referidas
4
Descripción
Measurements of lithium in stars of different galactic populations such
as young open clusters (Alpa Per, Pleiades, Praesepe, Coma, Hyades),
very young stellar associations (Taurus-Auriga, Chamaeleon, Ophiuchus
clouds), intermediate and old open clusters (NGC 752, M 67, NGC 188),
old disk stars, and halo stars give the observational framework from
which the galactic evolution of lithium has to be inferred. This element
is produced mainly via three mechanisms, including primordial
nucleosynthesis, spallation reactions in the interstellar medium, and
thermonuclear reactions in some particular stellar evolutionary stages
(novae, red giants). The complicated nucleosynthesis and the fact that
'astration' of lithium in stars is not well understood, makes a direct
interpretation of the lithium evolutionary abundance curve difficult.
The constraints set by recent lithium measurements in very old open
clusters and metal-deficient stars on galactic lithium production
mechanisms are discussed. Current problems in the determination of the
primordial lithium abundance are briefly reviewed.