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

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.

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

DOI

10.1051/0004-6361/201730616

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Congiu, E, Berton, M, Giroletti, M, Antonucci, R R J, Caccianiga, A, Kharb, P, Lister, M L, Foschini, L, Ciroi, S, Cracco, V, Frezzato, M, Järvelä, E, La Mura, G, Richards, J L & Rafanelli, P 2017, ' Kiloparsec-scale emission in the narrow-line Seyfert 1 galaxy Mrk 783 ', Astronomy and Astrophysics, vol. 603, A32 . https://doi.org/10.1051/0004-6361/201730616

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https://urn.fi/URN:NBN:fi:aalto-201710137027

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[article-cris] Sähkötekniikan korkeakoulu / ELEC

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

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