Rubidium, zirconium, and lithium production in intermediate-mass asymptotic giant branch stars
Context. A recent survey of a large sample of Galactic intermediate-mass (>3 M&sun;) asymptotic giant branch (AGB) stars shows that they exhibit large overabundances of rubidium (Rb) up to 100-1000 times solar. In contrast, zirconium (Zr) is not enriched in these stars compared to its solar abundances. These observations set constraints on our
van Raai, M. A. et al.
Fecha de publicación:
4
2012