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Cambridge University Press (CUP), Proceedings of the International Astronomical Union, S265(5), p. 122-123, 2009

DOI: 10.1017/s1743921310000359

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Detailed analyses of three neutron-capture-rich carbon-enhanced metal-poor stars

This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Data provided by SHERPA/RoMEO

Abstract

AbstractApproximately 20% of very metal-poor stars ([Fe/H] < −2.0) are strongly enhanced in carbon ([C/Fe] > +1.0). Such stars are referred to as carbon-enhanced metal-poor (CEMP) stars. We present a chemical abundance analysis based on high resolution spectra acquired with UVES at the VLT of three dwarf CEMP stars: SDSS J1349-0229, SDSS J0912+0216 and SDSS J1036+1212. These very metal-poor stars, with [Fe/H] < −2.5, were selected from our ongoing survey of extremely metal-poor dwarf candidates from the SDSS.Among these CEMPs, SDSS J1349-0229 has been identified as a carbon star ([C/O] > +1.0). First and second peak s-process elements, as well as second peak r-process elements have been detected in all stars. In addition, elements from the third r-process peak were detected in one of the stars, SDSS J1036+1212. We present the abundance results of these stars in the context of neutron-capture nucleosynthesis theories.

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