Volume 603, July 2017
|Number of page(s)||5|
|Published online||04 July 2017|
Kiloparsec-scale emission in the narrow-line Seyfert 1 galaxy Mrk 783
1 Dipartimento di Fisica e Astronomia “G. Galilei”, Università di Padova, Vicolo dell’Osservatorio 3, 35122 Padova, Italy
e-mail: firstname.lastname@example.org; email@example.com
2 INAF–Osservatorio Astronomico di Brera, via E. Bianchi 46, 23807 Merate (LC), Italy
3 INAF–Istituto di Radioastronomia, via Gobetti 101, 40129 Bologna, Italy
4 Department of Physics, University of California, Santa Barbara, CA 93106-9530, USA
5 National Centre for Radio Astrophysics, Tata Institute of Fundamental Research, Post Bag 3, Ganeshkhind, 411007 Pune, India
6 Department of Physics and Astronomy, Purdue University, 525 Northwestern Avenue, West Lafayette, IN 47907, USA
7 Aalto University Metsähovi Radio Observatory, Metsähovintie 114, 02540 Kylmälä, Finland
8 Aalto University Department of Electronics and Nanoengineering, PO Box 15500, 00076 Aalto, Finland
Received: 14 February 2017
Accepted: 30 April 2017
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.
Key words: galaxies: Seyfert / galaxies: jets / radio continuum: galaxies
© ESO, 2017
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