Kiloparsec-scale emission in the narrow-line Seyfert 1 galaxy Mrk 783

E. Congiu*, M. Berton, M. Giroletti, R.R.J. Antonucci, A. Caccianiga, P. Kharb, M. L. Lister, L. Foschini, S. Ciroi, V. Cracco, M. Frezzato, E. Järvelä, G. La Mura, J. L. Richards, P. Rafanelli

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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We present the first results of a radio survey of 79 narrow-line Seyfert 1 (NLS1) carried out with the Karl G. Jansky Very Large Array (JVLA) at 5 GHz in A configuration aimed at studying the radio properties of these sources. We report the detection of extended emission in one object: Mrk 783. This is intriguing, since the radio-loudness parameter R of this object is close to the threshold between radio-quiet and radio-loud active galactic nuclei (AGN). The galaxy is one of the few NLS1 showing such an extended emission at z < 0.1. The radio emission is divided into a compact core component and an extended component, observed on both sides of the nucleus and extending from 14 kpc southeast to 12 kpc northwest. There is no sign of a collimated jet and the shape of the extended component is similar to those of some Seyfert galaxies. The properties of the emission are compatible with a relic produced by the intermittent activity cycle of the AGN.

Original languageEnglish
Article numberA32
Number of pages5
JournalAstronomy and Astrophysics
Publication statusPublished - 1 Jul 2017
MoE publication typeA1 Journal article-refereed


  • Galaxies: Jets
  • Galaxies: Seyfert
  • Radio continuum: Galaxies

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