Journal of The Korean Astronomical Society (천문학회지)
- Volume 14 Issue 2
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- Pages.55-71
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- 1981
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- 1225-4614(pISSN)
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- 2288-890X(eISSN)
A SIMPLE DISK-HALO MODEL FOR THE CHEMICAL EVOLUTION OF OUR GALAXY
Abstract
On the basis of observational constraints, particularly the relationship between metal abundance and cumulative stellar mass, a simple two-zone disk-halo model for the chemical evolution of our Galaxy was investigated, assuming different chemical processes in the disk and halo and the infall rates of the halo gas defined by the halo evolution. The main results of the present model calculations are: (i) The halo formation requires more than 80% of the initial galactic mass and it takes a period of
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