Abstract :
Radio emission from radio-quiet (RQ) active galactic nuclei (AGN) is not well understood in the field of extragalactic astronomy. Interestingly, nearly 40% of Seyfert and LINER galaxies, representatives of the RQ AGN class, host kiloparsec-scale radio outflows (KSRs). In this talk, I will discuss how radio-polarimetric imaging can be utilized to understand the origin and propagation of these RQ outflows. I will present results from the Karl J. Jansky Very Large Array (VLA) and Giant Metrewave Radio Telescope (GMRT) observations of these Seyferts and LINERs belonging to the CfA+12 micron sample. Our observations reveal bent jets and lobes with magnetic fields closely tracing their morphology. We find signatures of shocks, gas entrainment, and evacuation demonstrating both positive and negative AGN feedback. Several sources also display evidence of episodic nuclear activity on small spatial scales. Most importantly, I will highlight our recent discovery of a magnetically driven, stratified outflow, with possible helical magnetic field geometry. These results suggest that magnetic fields play a dominant role in powering and structuring radio outflows in RQ AGN, thereby shaping the interaction between the central engine and its host galaxy environment. Additionally, I will highlight the capabilities of the radio-polarimetric studies and address the challenges involved in data reduction especially with the GMRT.
