Abstract Forty years ago Burbidge, Burbidge, Fowler, and Hoyle combined what we would
now call fragmentary evidence from nuclear physics, stellar evolution and the abundances …

Chemical equilibrium has proven extremely useful for predicting the chemical composition of
AGB atmospheres. Here we use a recently developed code and an updated thermochemical …

The structural and nucleosynthetic evolution of 3, 4, 5, 6 and stars with two metallicities (and
0.02) has been computed in detail, from the early pre-main sequence phase up to the …

We study the effects of self-shielding in the X-wind model of protosolar cosmic-ray irradiation
of early solar-system rocks. We adopt a two-component picture of protoCAIs consisting of …

Lithium and zirconium abundances (the latter taken as representative of s-process
enrichment) are determined for a large sample of massive Galactic O-rich AGB stars, for …

Context. A recent survey of a large sample of Galactic intermediate-mass (> 3 M⊙)
asymptotic giant branch (AGB) stars shows that they exhibit large overabundances of …

We demonstrate that the amount of extra mixing required to fit the observed low C/N and 12
C/13 C ratios in first giant branch (FGB) stars is also sufficient to explain the carbon and …

The evolution of the 7Li abundance in the Galaxy has been computed by taking into account
several 7Li sources: novae, massive AGB stars, C-stars, Type II SNe and GCRs. The …

A study is made of a sample of 58 dust-enshrouded asymptotic giant branch (AGB) stars
(including two possible post-AGB stars), of which 27 are carbon-rich and 31 are oxygen-rich …

The photospheres of low-mass red giants show CNO isotopic abundances that are not
satisfactorily accounted for by canonical stellar models. The same is true for the …