Speaker
Sergio Cristallo
(Osservatorio Astronomico Teramo (INAF, Italy))
Description
We present a new set of low mass AGB Stars models having the same mass (2 Msun) and
different metallicities (Z=1e-4, Z=e-3 and Z=1.5e-2, corresponding to the most
recent evaluation of the solar metallicity).
For each mass we present the evolution from the Pre Main Sequence up to the end of
the Thermally Pulsing AGB Phase.
The introduction of an exponential decay of the convective velocities at the inner
border of the convective envelope allows the formation of a tiny 13C pocket after
Third Dredge Up episodes, whose extension in mass decreases along the AGB path.
Detailed pulse by pulse surface enrichments and final yields at different
metallicities, using a full nuclear network directly incorporated in the FRANEC
stellar evolutionary code, are presented and discussed in detail. We follow the
production of both light and heavy elements describing nuclear chains responsible
of their production and show new results for the synthesis of radioactive isotopes
such as 26Al and 60Fe.
Author
Sergio Cristallo
(Osservatorio Astronomico Teramo (INAF, Italy))
Co-authors
Dr
Inma Dominguez
(Universidad de Granada)
Dr
Luciano Piersanti
(Osservatorio Astronomico Teramo (INAF, Italy))
Prof.
Oscar Straniero
(Osservatorio Astronomico Teramo (INAF, Italy))
Prof.
Roberto Gallino
(Universita' di Torino)
