We present a new determination of the optical luminosity function (OLF) of active galactic nuclei (AGN) at low redshifts (z<0.15) based on Hubble Space Telescope (HST) observations of X-ray-selected AGN. The HST observations have allowed us to derive a true nuclear luminosity function for these AGN. The resulting OLF illustrates a two-power-law form similar to that derived for QSOs at higher redshifts. At bright magnitudes, M_B<-20, the OLF derived here exhibits good agreement with that derived from the Hamburg/ESO QSO survey. However, the single power law form for the OLF derived from the Hamburg/ESO survey is strongly ruled out by our data at M_B>-20. Although the estimate of the OLF is best-fit by a power law slope at M_B<-20.5 that is flatter than the slope of the OLF derived at z>0.35, the binned estimate of the low redshift OLF is still consistent with an extrapolation of the z>0.35 OLF based on pure luminosity evolution.
@article{arxiv.astro-ph/0006022,
title = {The Space Density of low redshift AGN},
author = {D. Londish and B. J. Boyle and D. J. Schade},
journal= {arXiv preprint arXiv:astro-ph/0006022},
year = {2015}
}