On the Dark Matter Halos of Optical and IR-selected AGN in the Local
  Universe
  We use the technique of total satellite luminosity, L_sat, to probe the dark
matter halos around active galactic nuclei in the SDSS Main Galaxy Sample. Our
results focus on galaxies and AGN that are the central galaxy of their halo.
Our two AGN samples are constructed from optical emission-line diagnostics and
from WISE infrared colors. Both optically-selected and WISE-selected AGN have
L_sat values twice as high as non-active galaxy samples when controlling for
stellar mass and mean stellar age. This implies that the halos are twice as
massive, but we cannot rule out that the increase in L_sat is due to these AGN
residing in younger halos at the same mass. When only controlling for host
galaxy stellar mass, WISE-selected AGN also have higher L_sat values than
optical AGN at the factor of two level, consistent with previous results
comparing the clustering of obscured and unobscured AGN. However, controlling
for stellar age in the two populations of host galaxies removes half of this
difference, attenuating the statistical significance of the difference. We
perform permutation tests to quantify the different in the halo populations of
each sample. The difference in star formation properties does not fully explain
the difference in the two AGN populations, however. Although AGN luminosity
correlates with mean stellar age, the difference in stellar age between the
WISE and optical samples cannot be fully explained by differences in their AGN
luminosity distributions.
