Looking at Radio-Quiet AGN with Radio Polarimetry
  The dominant radio emission mechanism in radio-quiet quasars (RQQs) is an
open question. Primary contenders include: low-power radio jets, winds,
star-formation and coronal emission. Our work suggests that radio polarization
and emission-line studies can help to distinguish between these scenarios and
determine the primary contributor. Our multi-frequency, multi-scale radio
polarization study has revealed a composite jet and "wind" radio outflow in the
radio-intermediate quasar, III Zw 2, as well as in the BALQSO, Mrk 231. Our
radio polarization study in conjunction with the [O III] emission-line study of
five type 2 RQQs have provided insights on the interplay of jets/winds and
emission-line gas. These sources reveal an anti-correlation between polarized
radio emission and [O III] emission. This is similar to that observed in some
radio-loud AGN in the literature and suggests that the radio emission could be
depolarized by the emission-line gas. Overall, our work suggests that a close
interaction between the radio outflow and the surrounding gaseous environment
is likely to be responsible for their stunted form in RQ and RI AGN.
