Statistical analysis of Fe abundances gradients in the Galaxy
作者： Chenzhou Cui , Gang Zhao , Yongheng Zhao , Jianrong Shi
DOI: 10.1007/BF02872291
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摘要: Using the high precision data of proper motions and parallaxes from Hipparcos catalogue, we obtained orbital parameters 1302 stars in Galaxy based on mass distribution model provided by Allen Santillon. Fe abundances 1295 among our samples were analyzed. With correlation analyses between [Fe/H] parameters, that gradient is - 0.057 ± 0.007 dex/kpc along direction maximum galactocentric distance (hereafter DGmax) range 8.5 kpc < DGmax 17 kpc. We also got result vertical steeper than radial gradient. Furthermore, divided into two subgroups: giants dwarfs; F, G K stars; then analyzed them respectively. Our results show becomes flatter to dwarfs, F type stars. disk halo using Zmax = 1 as criterion are much higher work suggests existence galactic supports those chemlcal evolution medels which was formed before at early stage Galaxy.
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