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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: [email protected]
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: [email protected]
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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 

References

Aoki, W., Beers, T. C., Christlieb, N., Norris, J. E., Ryan, S. G., Tsangarides, S. 2007, ApJ, 655, 492Google Scholar
Beers, T. C., Preston, G. W., Shectman, S. A. 1992, AJ, 103, 1987CrossRefGoogle Scholar
Casagrande, L., Ramirez, I., Melendez, J., Bessell, M., Asplund, M. 2010, A&A 512, 54Google Scholar
Castelli, F., & Kurucz, R. 2003, IAUS, 210, 20Google Scholar
Christlieb, N., Schorck, T., Frebel, A., Beers, T. C., Wisotzki, L., Reimers, D. 2008, A&A, 484, 721Google Scholar
For, B.-Q., Sneden, C. 2010, AJ 140, 1694Google Scholar
Grevesse, N. & Sauval, A. J. 1998, SSRv, 85, 161Google Scholar
Hayek, W., Wiesendahl, U., Christlieb, N., Eriksson, K., Korn, A. J., Barklem, P. S., Hill, V., Beers, T. C., Farouqi, K., Pfeiffer, B., Kratz, K. L. 2009, A&A, 504, 511Google Scholar
Kurucz, R. 1993a, ATLAS9 Stellar Atmosphere Programs and 2km/s grid. Kurucz CD-ROM No.13. Cambridge, Mass.: Smithsonian Astrophysical Observatory, 13Google Scholar
Kurucz, R. 1993b, SYNTHE Spectrum Synthesis Programs and Line Data. Kurucz CD-ROM No.18. Cambridge, Mass.: Smithsonian Astrophysical Observatory, 18Google Scholar
Kurucz, R. 2005, MSAIS, 8, 14Google Scholar
Lind, K., Bergemann, M., Asplund, M. 2012, MNRAS, 427, 50CrossRefGoogle Scholar
Melendez, J. & Barbuy, B. 2009, A&A, 497, 611Google Scholar
Norris, J. E., Ryan, S. G., Beers, T. C. 1996, ApJS, 107, 391CrossRefGoogle Scholar
Norris, J. E., Ryan, S. G., Beers, T. C. 1999, ApJS, 123, 639Google Scholar
Preston, G. W., Sneden, C., Thompson, I. B., Shectman, S. A., Burley, G. S. 2006, AJ, 132, 85Google Scholar
Roederer, I. U., Sneden, C., Thompson, I. B., Preston, G. W., Shectman, S. A. 2010, ApJ, 711, 573Google Scholar
Ryan, S. G., Norris, J. E., Beers, T. C. 1996, ApJ, 471, 254Google Scholar
Sbordone, L., Bonifacio, P., Castelli, F., & Kurucz, R. 2004, MSAIS, 5, 93Google Scholar
Sbordone, L., Bonifacio, P., Caffau, E., Ludwig, H. G., Behara, N. T., Gonzalez Hernandez, J. I., Steffen, M., Cayrel, R., Freytag, B., van't Veer, C., Molaro, P., Plez, B., Sivarani, T., Spite, M., Spite, F., Beers, T. C., Christlieb, N., Francois, P., Hill, V. 2010, A&A, 522, 26Google Scholar
Yong, D., Norris, J. E., Bessell, M. S., Christlieb, N., Asplund, M., Beers, T. C., Barklem, P. S., Frebel, A., Ryan, S. G. 2013, ApJ, 762, 26Google Scholar