The metallicity distribution of F/G dwarfs derived from BATC survey data

Details The metallicity distribution of F/G dwarfs derived from BATC survey data The metallicity distribution of F/G dwarfs derived from BATC survey data

2004-08-30

arxiv.org/abs/astro-ph/0408543v1

Astronomy and Astrophysics

Astrophysics

22 pages, 9 figure, accepted by Astronomical Journal

Scientific paper

10.1086/424858

Based on synthetic flux spectra calculated from theoretical atmospheric models, a calibration of temperature and metallicity for the dwarfs observed in the Beijing-Arizona-Taiwan-Connecticut (BATC) multicolor photometric system is presented in this paper. According to this calibration, stellar effective temperatures can be obtained from some temperature-sensitive color indices. The sample stars have colors and magnitudes in the ranges 0.15 kpc, it could not be interpreted according to the different contributions from the three components because of the large uncertainty. So it is possible that there is little or no gradient for z>5 kpc. The overall distribution shows a metallicity gradient d[Fe/H]/dz=-0.17+-0.04dex/kpc for z<15 kpc.

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