The dependence of the galaxy mass-metallicity relation on environment and the implied metallicity of the IGM

  title={The dependence of the galaxy mass-metallicity relation on environment and the implied metallicity of the IGM},
  author={Yingjie Peng and Roberto Maiolino},
  journal={Monthly Notices of the Royal Astronomical Society},
We explore the dependence of the galaxy mass-metallicity relation on environment in SDSS, in terms of both over-density and central/satellite dichotomy. We find that at a given stellar mass, there is a strong dependence of metallicity on over-density for star-forming satellites. Instead, for star-forming centrals no correlation is found. Star-forming satellites at different stellar masses form a tight sequence in the average overdensity - metallicity plane, which covers the entire observed… 

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