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s/r ratios in carbon-enhanced metal-poor stars

Published online by Cambridge University Press:  09 March 2010

Dinah M. Allen ,
Sean G. Ryan ,
Silvia Rossi  and
Stelios A. Tsangarides
Dinah M. Allen
Affiliation:
Instituto de Astronomia, Geofí sica e Ciências Atmosféricas, Universidade de São Paulo, Rua do Matão 1226, 05508-900 São Paulo, Brazil email: dimallen@astro.iag.usp.br, rossi@astro.iag.usp.br
Sean G. Ryan
Affiliation:
Centre for Astrophysics Research, STRI and School of Physics, Astronomy and Mathematics, University of Hertfordshire, Hatfield, UK email: s.g.ryan@herts.ac.uk
Silvia Rossi
Affiliation:
Instituto de Astronomia, Geofí sica e Ciências Atmosféricas, Universidade de São Paulo, Rua do Matão 1226, 05508-900 São Paulo, Brazil email: dimallen@astro.iag.usp.br, rossi@astro.iag.usp.br
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Abstract

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We present the results of [Ba/Eu] ratio determinations for a sample of Carbon-Enhanced Metal Poor (CEMP) stars, comparing them with other CEMP stars found in the literature for which abundances for both elements are available. The stellar spectra were observed at 4.2m William Herschel Telescope (WHT) on July/2003, using Utrecht Echelle Spectrograph (UES) with R ~ 52000 and S/N ~ 40. WHT covers a wavelength range of λλ3700-5700.

Keywords

stars: abundancesstars: carbonstars: chemically peculiar
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Symposium S265: Chemical Abundances in the Universe: Connecting First Stars to Planets , August 2009 , pp. 118 - 119
Copyright
Copyright © International Astronomical Union 2010

References

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Tsangarides, S. A. 2005, Ph.D. Thesis, The Open University, UKGoogle Scholar