| Summary: | We present results from a combined radio polarization and emission-line study of five type 2 quasars at z < 0.2 with the Karl G. Jansky Very Large Array (VLA) B-array at 5 GHz and Hubble Space Telescope ( HST ) [O III ] observations. These five sources are known to exhibit close association between radio structures and ionized gas morphology and kinematics. Four sources (J0945 + 1737, J1000 + 1242, J1356 + 1026, and J1430 + 1339) show polarization in the current data. J1010 + 1413 is the unpolarized source in our sample. We detect 0 . 5 -1 per cent fractional polarization in the radio cores and a high fractional polarization (10 -30 percent ) in the lobes of these sources. The morphological, spectral, and polarization properties suggest a jet origin for radio emission in J0945 + 1737, J1000 + 1242, J1010 + 1413, and J1430 + 1339 whereas the current data cannot fully discern the origin of radio emission (jet or wind) in J1356 + 1026. An anticorrelation between various polarized knots in the radio and [O III ] emission is observed in our sources, similar to that observed in some radio-loud AGN in the literature. This suggests that the radio emission is likely to be depolarized by the emission-line gas. By modelling the depolarization effects, we estimate the size of the emission-line gas clouds to be ∼(2.8 ±1.7) ×10 -5 parsec and the amount of thermal material mixed with the synchrotron plasma to be ∼(1.01 ±0.08) ×10 6 M ⊙in the lobe of J0945 + 1737 (which exhibits the most prominent polarization signature in its lobe). The current work demonstrates that the interplay of jets/winds and emission-line gas is most likely responsible for the nature of radio outflows in radio-quiet AGN. © 2022 The Author(s)
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