Volume 328 - Revisiting narrow-line Seyfert 1 galaxies and their place in the Universe (NLS1-2018) - Jetted NLS1s
Parsec-scale Nuclear Radio Structures in Seyfert Galaxies
P. Kharb
Full text: pdf
Pre-published on: July 07, 2018
Published on: December 21, 2018
Abstract
Radio outflows of extents ranging from a few parsecs to a few kiloparsecs are present in Seyfert and LINER galaxies that make up the radio-quiet'' AGN class. AGN jets and/or starburst superwinds have been suggested to produce these outflows. We present a brief review of radio outflows in Seyfert and LINER galaxies on different spatial scales. Very long baseline interferometry (VLBI) observations of several individual Seyferts and LINERs suggest a link between AGN jets on parsec-scales and their kiloparsec-scale radio structures (KSRs). The whole range of misalignment angles present between the parsec-scale and the kpc-scale outflows in Seyfert galaxies and LINERs, supports the prevalence of bent outflows in them. Episodic AGN activity is suggested by the presence of multiple misaligned KSRs in several Seyfert galaxies in total and polarized intensity images; this latter result provides further support for an AGN jet origin of the KSRs present in Seyfert and LINER galaxies.
DOI: https://doi.org/10.22323/1.328.0023
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