The most luminous H α emitters at z ˜ 0.8-2.23 from HiZELS: evolution of AGN and star-forming galaxies

  title={The most luminous H $\alpha$ emitters at z ˜ 0.8-2.23 from HiZELS: evolution of AGN and star-forming galaxies},
  author={David Sobral and Saul A. Kohn and Philip N. Best and I. R. Smail and C. M. Harrison and John P Stott and Jo{\~a}o Calhau and Jorryt Matthee},
  journal={Monthly Notices of the Royal Astronomical Society},
We use new near-infrared spectroscopic observations to investigate the nature and evolution of the most luminous H\alpha (Ha) emitters at z~0.8-2.23, which evolve strongly in number density over this period, and compare them to more typical Ha emitters. We study 59 luminous Ha emitters with $L_{H\alpha}>L_{H\alpha}^*$, roughly equally split per redshift slice at z~0.8, 1.47 and 2.23 from the HiZELS and CF-HiZELS surveys. We find that, overall, 30$\pm$8% are AGN (80$\pm$30% of these AGN are… Expand
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