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Abundance analysis of three metal poor stars: CS 22166-0030, CS 22186-0005, and CS 30344-0033

Published online by Cambridge University Press:  06 January 2014

Şeyma Çalışkan ,
Elisabetta Caffau ,
Piercarlo Bonifacio ,
Luca Sbordone  and
Berahitdin Albayrak
Şeyma Çalışkan
Affiliation:
Department of Astronomy and Space Sciences, Ankara University, 06100 Tandoğan, Ankara, Turkey email: Seyma.Caliskan@science.ankara.edu.tr
Elisabetta Caffau
Affiliation:
Zentrum für Astronomie der Universität Heidelberg, Landessternwarte, Königstuhl 12, 69117 Heidelberg, Germany
Piercarlo Bonifacio
Affiliation:
GEPI, Observatorie de Paris, CNR, Université Paris Diderot, Place Jules Janssen, 92190 Meudon, France
Luca Sbordone
Affiliation:
Zentrum für Astronomie der Universität Heidelberg, Landessternwarte, Königstuhl 12, 69117 Heidelberg, Germany
Berahitdin Albayrak
Affiliation:
Department of Astronomy and Space Sciences, Ankara University, 06100 Tandoğan, Ankara, Turkey email: Seyma.Caliskan@science.ankara.edu.tr
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Abstract

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We present the abundance analysis of three very metal poor stars, CS 22166-0030 ([Fe/H]=−2.96), CS 22186-0005 ([Fe/H]=−2.70), and CS 30344-0033 ([Fe/H]=−2.90). Our study is based on high resolution spectra which were obtained from SARG (on TNG), HARPS (on 3.6m), and UVES (on VLT) spectrographs and one-dimensional ATLAS9 model atmospheres. We derived the abundances for 2, 9, and 16 atomic species in the spectrum of CS 22166-0030, CS 22186-0005, and CS 30344-0033, respectively. The Na and Mg abundances of CS 22166-0030 are highly under-abundant with respect to the solar values. The abundance patterns of CS 22186-0005 and CS 30344-0033 are consistent with the other halo stars within abundance uncertainties.

Keywords

stars: abundancesstars: Population IIGalaxy: abundancesGalaxy: evolution
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S298: Setting the scene for Gaia and LAMOST , May 2013 , pp. 381 - 386
Copyright
Copyright © International Astronomical Union 2014 

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