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

Research output: Contribution to journalArticleScientificpeer-review


  • 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
  • Emilia Järvelä

  • G. La Mura
  • J. L. Richards
  • P. Rafanelli

Research units

  • University of Padova
  • Osservatorio Astronomico di Brera
  • INAF Istituto di Radioastronomia
  • University of California at Santa Barbara
  • Tata Institute of Fundamental Research
  • Purdue University


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

    Research areas

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

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