Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010acasn..51..221x&link_type=abstract
Acta Astronomica Sinica, vol. 51, no. 3, p. 221-227
Astronomy and Astrophysics
Astronomy
Nuclear Reactions, Nucleosynthesis, Stars: Fundamental Parameters, Galaxy: Abundances
Scientific paper
The abundance distribution of heavy elements of solar system is considered as the standard abundance pattern in this paper. Based on a large number of observational data of element abundances in metal-poor stars, Sr, Ba and Eu are chosen as the representative elements for the weak s-process, main s-process and r-process, respectively. The parameterized method is adopted to explore the heavy element abundance pattern of these stars. Then the different contributions from three kinds of neutron-capture processes to the abundance distribution of heavy elements are discussed. It is shown that, considering the stars with metallicities similar to the solar system, the contributions from three kinds of neutron-capture processes to this abundance distribution are also similar to the solar system. The heavy elements of the metal-poor stars are mainly produced by r- and main s- neutron-capture processes at low metallicity.
Hu Jianbin
Li Chi Pui
Li Jason Hongjun
Xie Yu-Guang
Zhang Baigang
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