Spectral energy distributions of quasars selected in the mid-infrared Conference Paper uri icon

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  • AbstractWe present preliminary results on fitting of SEDs to 142 z < 1 quasars selected in the mid-infrared. Our quasar selection finds objects ranging in extinction from highly obscured, type-2 quasars, through more lightly reddened type-1 quasars and normal type-1s. We find a weak tendency for the objects with the highest far-infrared emission to be obscured quasars, but no bulk systematic offset between the far-infrared properties of dusty and normal quasars as might be expected in the most naive evolutionary schemes. The hosts of the type-2 quasars have stellar masses comparable to those of radio galaxies at similar redshifts. Many of the type-1s, and possibly a one of the type-2s require a very hot dust component in addition to the normal torus emission.


  • Lacy, M
  • Sajina, A
  • Petric, Anthony
  • Ridgway, SE
  • Nielsen, DM
  • Urrutia, T
  • Farrah, D
  • Gates, EL

publication date

  • September 2011