s-Process Abundances in AGB Stars At Various Metallicities and Their Theoretical Interpretation

Details s-Process Abundances in AGB Stars At Various Metallicities and Their Theoretical Interpretation s-Process Abundances in AGB Stars At Various Metallicities and Their Theoretical Interpretation

Feb 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997nupha.621..431b&link_type=abstract

Nuclear Physics A, v. 621, p. 431-434.

Physics

Nuclear Physics

5

Scientific paper

Results from existing models of s-processing in red giants are compared with key observed abundances in population I and II AGB stars. Population I giants are particularly important for getting constraints on the neutron density (from Rb/Sr ratios), while population II AGB's provide clues to understand how the neutron exposure is achieved (through the ratio between Ba-peak and Sr-peak elements). AGB stars are shown to require s-processing with a very low neutron density, and producing very high Ba/Sr ratios at low metallicities. Both features are typical of radiative 13C-burning phases in AGB stars.

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