Heavy elements abundances in metal-poor stars

Details Heavy elements abundances in metal-poor stars Heavy elements abundances in metal-poor stars

Feb 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aipc..425..592m&link_type=abstract

Tours symposium on nuclear physics III. AIP Conference Proceedings, Volume 425, pp. 592-601 (1998).

Physics

Nuclear Physics

Stellar Structure, Interiors, Evolution, Nucleosynthesis, Ages, Star Formation

Scientific paper

A sample of 21 metal-poor stars have been analysed on the basis of high resolution and high signal-to-noise spectra. Correlations between relative abundances of 16 elements have been studied, with a special emphasis on the neutron-capture ones. This analysis reveals the existence of two sub-populations of field halo stars, namely Pop IIa and Pop IIb. They differ by the behaviour of the s-process elements versus the α and r-process elements. We suggest a scenario of formation of these stars, which closely relates the field halo stars to the evolution of globular clusters. The two sub-populations would have evaporated the clusters during two different stages of their chemical evolution.

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