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.
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机译：使用〜2200 BATC主序列（MS）恒星，包括SDSS Stellar大气参数，我们开发多项式光度校准方法，以评估BATC数据的恒星有效温度和金属性。这种校准方法已应用于约160 000毫升恒星。平均恒星金属度在0.5 <| Z |中平均从-0.65至-0.78 dex降低。 ≤2kpc。光环中的金属分布和厚盘似乎不变，距离银晶平面的距离。
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