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http://hdl.handle.net/20.500.12386/26803
Titolo: | Kiloparsec-scale emission in the narrow-line Seyfert 1 galaxy Mrk 783 | Autori: | Congiu, E. Berton, M. GIROLETTI, MARCELLO Antonucci, R. CACCIANIGA, Alessandro Kharb, P. Lister, M. L. FOSCHINI, LUIGI Ciroi, S. Cracco, V. Frezzato, M. Järvelä, E. La Mura, G. Richards, J. L. Rafanelli, P. |
Data pubblicazione: | 2017 | Rivista: | ASTRONOMY & ASTROPHYSICS | Numero: | 603 | Da pagina:: | A32 | Abstract: | 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. | URI: | http://hdl.handle.net/20.500.12386/26803 | URL: | https://www.aanda.org/articles/aa/abs/2017/07/aa30616-17/aa30616-17.html | ISSN: | 0004-6361 | DOI: | 10.1051/0004-6361/201730616 | Bibcode ADS: | 2017A&A...603A..32C | Fulltext: | open |
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