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The stellar metallicity distribution of the Galaxy from the BATC survey

Published online by Cambridge University Press:  06 January 2014

Xiyan Peng ,
Cuihua Du ,
Zhenyu Wu ,
Jun Ma  and
Xu Zhou
Xiyan Peng
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, P. R. China Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, P. R. China email: xypeng@bao.ac.cn School of physics, University of the Chinese Academy of Sciences, Beijing 100049, P. R. China email: ducuihua@ucas.ac.cn
Cuihua Du
Affiliation:
School of physics, University of the Chinese Academy of Sciences, Beijing 100049, P. R. China email: ducuihua@ucas.ac.cn
Zhenyu Wu
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, P. R. China Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, P. R. China email: xypeng@bao.ac.cn
Jun Ma
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, P. R. China Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, P. R. China email: xypeng@bao.ac.cn
Xu Zhou
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, P. R. China Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, P. R. China email: xypeng@bao.ac.cn
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Abstract

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Using ~2200 BATC main sequence (MS) stars which include SDSS stellar atmospheric parameters, we develop the polynomial photometric calibration method to evaluate the stellar effective temperature and metallicity for BATC data. This calibration method has been applied to about 160 000 MS stars. The mean stellar metallicity smoothly decreases from −0.65 to −0.78 dex in the interval 0.5 < |Z| ≤ 2 kpc. Metallicity distributions in the halo and the thick disk seem invariant with the distance from the Galactic plane.

Keywords

Galaxy: disk - Galaxy: halo- Galaxy: metallicity - Galaxy: formation
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S298: Setting the scene for Gaia and LAMOST , May 2013 , pp. 432
Copyright
Copyright © International Astronomical Union 2014 

References

Ivezić, Ž., et al., 2008, ApJ, 684, 287CrossRefGoogle Scholar
Peng, X. Y., Du, C. H., Wu, Z. Y., 2012, MNRAS, 422, 2756CrossRefGoogle Scholar
Du, C. H., et al., 2006, MNRAS, 372, 1304CrossRefGoogle Scholar