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Searching for extremely alpha-poor stars in the Galactic Halo

Published online by Cambridge University Press:  06 January 2014

Qianfan Xing  and
Gang Zhao
Qianfan Xing
Affiliation:
Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China email: [email protected], [email protected] University of Chinese Academy of Sciences, Beijing 100049, China
Gang Zhao
Affiliation:
Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China email: [email protected], [email protected]
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Abstract

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A few alpha-poor stars that show severe departures (over 0.4 dex deficiency in alpha-element abundance) from the general enhanced alpha-element chemical abundance trends of the halo have been discovered in recent years, such as BD +80°245, G4-36 and CS 22966-043. These ratios suggest a different chemical enrichment history for these stars than for the majority of the halo. Similarly low-alpha abundance patterns are also seen in the Sagittarius dSph galaxy. We present a method for searching of extremely alpha-poor stars from low-resolution stellar spectra of LAMOST pilot survey and attempt to create a large sample of these particular Galactic halo stars.

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S298: Setting the scene for Gaia and LAMOST , May 2013 , pp. 449
Copyright
Copyright © International Astronomical Union 2014 

References

Carney, B. W., Wright, J. S., Sneden, C., Laird, J. B., Aguilar, L. A., & Latham, D. W. 1997, AJ, 114, 363CrossRefGoogle Scholar
Hanson, Robert B., Sneden, Christopher, Kraft, Robert P., & Fulbright, J. 1998, AJ, 116, 1286Google Scholar
King, J. R. 1997, AJ, 113, 2302CrossRefGoogle Scholar
Tinsley, B. M. 1979, ApJ, 229, 1046CrossRefGoogle Scholar