The Activity of the Neighbours of Seyfert Galaxies
E. Koulouridis, M. Plionis, V. Chavushyan, D. Dultzin, Y. Krongold, I., Georgantopoulos, J. Leon-Tavares

TL;DR
This study investigates the activity of neighboring galaxies around Seyfert types, revealing a high prevalence of star formation and nuclear activity, and finds significant correlations between neighbor ionization levels and the central galaxy type, supporting galaxy interaction-driven activity.
Contribution
It provides new evidence linking galaxy interactions to AGN activity and explores differences in stellar populations and ionization between neighbors of Seyfert 1 and 2 galaxies.
Findings
Over 70% of neighboring galaxies show star formation or AGN activity.
Neighbors of Sy2 galaxies are more ionized than those of Sy1 galaxies.
Significant correlation between neighbor ionization and central galaxy type.
Abstract
We present a follow-up study on a series of papers concerning the role of close interactions as a possible triggering mechanism of AGN activity. We have already studied the close (<100kpc/h) and the large scale (<1 Mpc/h) environment of a local sample of Sy1, Sy2 and bright IRAS galaxies (BIRG) and their respective control samples. The results led us to the conclusion that a close encounter appears capable of activating a sequence where an absorption line galaxy (ALG) galaxy becomes first a starburst, then a Sy2 and finally a Sy1. Here we investigate the activity of neighboring galaxies of different types of AGN, since both galaxies of an interacting pair should be affected. To this end we present the optical spectroscopy and X-ray imaging of 30 neighbouring galaxies around two local (z<0.034) samples of 10 Sy1 and 13 Sy2 galaxies. Based on the optical spectroscopy we find that more…
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Taxonomy
TopicsAstronomy and Astrophysical Research · Stellar, planetary, and galactic studies · Astronomical Observations and Instrumentation
