Lugaro, M.; Karakas, A. I.; van Raai, M.; García-Hernández, D. A.; Trigo-Rodríguez, J. M.
Bibliographical reference
IXTH TORINO WORKSHOP ON EVOLUTION AND NUCLEOSYNTHESIS IN AGB STARS AND THE IIND PERUGIA WORKSHOP ON NUCLEAR ASTROPHYSICS. AIP Conference Proceedings, Volume 1001, pp. 269-276 (2008).
Advertised on:
4
2008
Citations
3
Refereed citations
0
Description
The origin of short-lived radioactive nuclei at the time of the
formation of the Sun is a much debated mystery in modern astronomy. We
show that abundance predictions for massive AGB stars (roughly 6
Msolar) of solar metallicity can self-consistently match the
abundances of 26Al, 41Ca, 60Fe, and
107Pd in the early Solar System, as derived from meteorite
analysis. On the other hand our models do not produce 182Hf,
thus confirming previous results. Recent measurements of excesses in
62Ni and 96Zr, correlated to 60Fe, can
be accounted for by a massive AGB source. Moreover, these stars could be
an important source of 87Rb, as recently observed, and thus
induce the fluctuations in the Rb/Sr ratio observed in primitive
chondritic materials. Finally, we discuss recent observations of
decoupling between the presence of 26Al and 60Fe
in differentiated planetesimals and their implications on candidate
stellar sources.