Stellar nuclei and inner polar disks in lenticular galaxies
  I analyze statistics of the stellar population properties for stellar nuclei
and bulges of nearby lenticular galaxies in different environments by using
panoramic spectral data of the integral-field spectrograph SAURON retrieved
from the open archive of Isaac Newton Group. I estimate also the fraction of
nearby lenticular galaxies having inner polar gaseous disks by exploring the
volume-limited sample of early-type galaxies of the ATLAS-3D survey. By
inspecting the two-dimensional velocity fields of the stellar and gaseous
components with running tilted-ring technique, I have found 7 new cases of the
inner polar disks. Together with those, the frequency of inner polar disks in
nearby S0 galaxies reaches 10% that is much higher than the frequency of
large-scale polar rings. Interestingly, the properties of the nuclear stellar
populations in the inner polar ring hosts are statistically the same as those
in the whole S0 sample implying similar histories of multiple gas accretion
events from various directions.
