SIMBAD references

2019ApJ...871..249K - Astrophys. J., 871, 249-249 (2019/February-1)

A curved 150 pc long jet in the Double-peaked emission-line AGN KISSR 434.


Abstract (from CDS):

Double-peaked emission lines in the narrow- and/or broad-line spectra of active galactic nuclei (AGNs) have been suggested to arise as a result of disky broad/narrow-line regions, jet-medium interaction, or the presence of binary supermassive black holes. We present the results from 1.5 and 4.9 GHz phase-referenced very long baseline interferometry (VLBI) observations of the Seyfert type 2 galaxy KISSR 434, which exhibits double-peaked emission lines in its optical spectrum. We detect a steep-spectrum (α < -1), curved and long (∼150 pc) jet in the VLBI images of KISSR 434. The jet curvature could be a result of precession rather than ram pressure bending from a rotating interstellar medium. Precession could in turn arise as a result of a warped accretion disk or the presence of a binary black hole with a separation of 0.015 pc, not accessible to present-day telescopes. An examination of the emission-line ratios with the MAPPINGS III code reveals that AGN photoionization is likely to be responsible for the observed line ratios and not shock ionization due to the jet. A light (with jet-to-ambient medium density ratio of η ∼ 0.01) and fast (with speed vj≳0.75c) precessing jet in KISSR 434 may have stirred up the emission-line gas clouds to produce the observed splits in the narrow-line peaks but is not powerful enough to shock-ionize the gas.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): galaxies: individual: KISSR 434 - galaxies: jets - galaxies: Seyfert

Simbad objects: 10

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