Radio probes of AGN winds in high Eddington ratio AGN

High Eddington ratio (L/L_Edd > 0.3) AGN are likely to launch a radiation-driven wind. Does this wind interact with the ambient medium and produce radio emission? I will present a study of the correlations between a parsec-scale radio wind and a broad-line region (BLR) wind in a sample of 20 radio-quiet quasars. The radio wind is defined based on the spectral slope and the flux compactness of the 1-5 GHz parsec-scale emission, and the BLR wind is defined by the excess blue wing in the C IV emission line profile. The high Eddington ratio objects are found to have both radio and BLR wind indicators. This suggests that the BLR wind extends to parsec scales and produces radio emission. Radio is a key to probe the interaction between the AGN winds and the ambient medium.