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| Paper: |
The Metallicity Evolution of Interacting Galaxies |
| Volume: |
477, Galaxy Mergers in an Evolving Universe |
| Page: |
237 |
| Authors: |
Torrey, P.; Cox, T. J.; Kewley, L.; Hernquist, L. |
| Abstract: |
Nuclear inflows of metal–poor interstellar gas triggered by galaxy
interactions can account for the systematically lower central oxygen
abundances observed in local interacting galaxies. We
investigate the metallicity evolution of a large set of simulations of
colliding galaxies with numerical simulations including cooling, star formation,
feedback, and mass recycling. We focus on the influence of merger–induced
inflows and chemical enrichment in determining the nuclear
metallicity evolution. We find an average depression in the nuclear metallicity of
∼0.07 for gas–poor disk–disk interactions. The simulations fare reasonably well when
compared to the observed mass–metallicity and separation–metallicity
relationships. |
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