GALAXY DOWNSIZING AND THE REDSHIFT EVOLUTION OF OXYGEN AND NITROGEN ABUNDANCES: ORIGIN OF THE SCATTER IN THE N/H–O/H DIAGRAM

@article{Pilyugin2011GALAXYDA,
  title={GALAXY DOWNSIZING AND THE REDSHIFT EVOLUTION OF OXYGEN AND NITROGEN ABUNDANCES: ORIGIN OF THE SCATTER IN THE N/H–O/H DIAGRAM},
  author={Leonid S. Pilyugin and Trinh Xuan Thuan},
  journal={The Astrophysical Journal},
  year={2011},
  volume={726}
}
The oxygen and nitrogen abundance evolutions with redshift of emission-line galaxies in the Sloan Digital Sky Survey are considered for four intervals of galaxy stellar masses, ranging from 10{sup 11.3} M{sub sun} to 10{sup 10.2} M{sub sun}. We have measured their line fluxes and derived the O and N abundances using recent calibrations. The evolution of O and N abundances with redshift clearly shows the galaxy downsizing effect, where enrichment (and hence star formation) ceases in high-mass… Expand

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