Computer Science
Scientific paper
Aug 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1269..366h&link_type=abstract
THE 10TH INTERNATIONAL SYMPOSIUM ON ORIGIN OF MATTER AND EVOLUTION OF GALAXIES: OMEG-2010. AIP Conference Proceedings, Volume 1
Computer Science
Element Relative Abundance, Nucleosynthesis, Interstellar Matter, Supernovae, Origin, Formation, And Abundances Of The Elements, Stellar Structure, Interiors, Evolution, Nucleosynthesis, Ages, Interstellar Dust Grains, Diffuse Emission, Infrared Cirrus, Supernovae
Scientific paper
We determined the Zn abundances of 18 very metal-poor stars studied by our previous work (Honda et al.. 2004) that covers the metallicity range of -3.1<[Fe/H]<-2.5. The [Zn/Fe] values of most stars show an increasing trend with decreasing [Fe/H] in this metallicity range, confirming the results found by previous studies. However, the extremely metal-poor star BS16920-017 ([Fe/H] =-3.1) has a significantly high Zn/Fe ratio ([Zn/Fe] = +0.9). Comparisons of the chemical abundances of this object with HD4306, which has similar atmospheric parameters with BS16920-017, clearly demonstrate the deficiency of α-elements and neutron-capture elements, while enhancement of Mn and Ni, as well as Zn, in BS16920-017. This object may be strongly reflecting the result of the nucleosynthesis by hypernovae explosion.
Aoki Wako
Beers Timothy C.
Honda Satoshi
Takada-Hidai Masahide
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