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Paper: What Causes the Abundance Gradient and its Evolution along the Galaxy Disk?
Volume: 404, The Eighth Pacific Rim Conference on Stellar Astrophysics: A Tribute to Kam Ching Leung
Page: 36
Authors: Hou, J.L.; Fu, J.; Chang, R.X.; Yin, J.; Chen L.
Abstract: Based on a simple model of the chemical evolution of the Milky Way disk, we investigate the disk abundance gradient and its time evolution. Two star formation rates (SFRs) are considered, one is the classical Kennicutt- Schmidt law (Ψ = 0.25 1.4 gas, hereafter C-KS law), another is the modified Kennicutt law (Ψ = á 1.4 gas (V/r), hereafter M-KS law). We made a detailed comparison for the past history of abundance gradient by using tracers of planetary nebulae and open clusters along the Milky Way disk. We find that for an individual Milky Way-type galaxy, a better description about the local SFR is the modified KS law.
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