Two Epochs of VLBI Observations of 8 KISSR Seyfert & LINER Galaxies: Suggestions of Fast and Filamentary Outflows
Preeti Kharb (NCRA-TIFR), Anderson Caproni (Universidade Cidade de Sao Paulo), Salmoli Ghosh (NCRA-TIFR), Daniel A. Schwartz (CfA), Mousumi Das (IIA), Smitha Subramanian (IIA), Sravani Vaddi (Arecibo)

TL;DR
This study presents multi-epoch VLBI observations of 8 Seyfert and LINER galaxies, revealing persistent and evolving parsec-scale jets, superluminal motions, and structures suggesting AGN-driven outflows and interactions with their environment.
Contribution
First multi-epoch VLBI study of KISSR Seyfert and LINER galaxies showing jet persistence, superluminal motions, and detailed jet-environment interactions in radio-quiet AGN.
Findings
Detection of parsec-scale radio emission in 7 of 8 sources.
Evidence of superluminal jet motion in two sources.
Jets lose collimation over 200 parsec to 1 kpc scales.
Abstract
We present here the results from a second epoch of phase-referenced VLBA observations of 8 Seyfert and LINER galaxies from the KISSR sample. These sources were chosen based on the presence of double peaks or asymmetries in their emission lines as observed in SDSS spectra. Parsec-scale radio emission is detected in 7 of the 8 sources in the second epoch. Jet-like features appear to persist over a year timeline in these `radio-quiet' AGN. A few sources like KISSR1494, however, show significantly different structures after a 9 year interval. KISSR102, which was previously suggested to be a binary black hole candidate based on the presence of two compact cores, shows the tentative signatures of superluminal jet motion (c). Tentative superluminal motion in a jet knot has been reported in another source, KISSR872 (c). We present 1.5 GHz images from the VLA…
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Taxonomy
TopicsGalaxies: Formation, Evolution, Phenomena · Astrophysics and Cosmic Phenomena · Astrophysical Phenomena and Observations
