Spectropolarimetry of NGC3783 and Mrk509: Evidence for powerful nuclear
  winds in Seyfert 1 Galaxies
  We present results from high signal-to-noise optical spectropolarimetric
observations of the Seyfert 1 galaxies NGC783 and Mrk509 in the 3500-7000 A
range. We find complex structure in the polarized emission for both objects. In
particular, Position Angle (PA) changes across the Balmer lines show a
distinctive 'M'-shaped profile that had not been observed in this detail
before, but could represent a common trait in Seyfert 1 galaxies. In fact,
while this shape is observed in all Balmer lines in NGC3783, Mrk509 transitions
into a 'M'-shaped PA profile for higher transitions lines. We have modeled the
observed profiles using the STOKES radiative transfer code and assuming that
the scattering region is co-spatial with the BLR and outflowing. The results
give compelling new evidence for the presence of nuclear winds in these two
Seyfert 1 galaxies.
