Issue |
A&A
Volume 591, July 2016
|
|
---|---|---|
Article Number | A88 | |
Number of page(s) | 16 | |
Section | Extragalactic astronomy | |
DOI | https://doi.org/10.1051/0004-6361/201527056 | |
Published online | 20 June 2016 |
[O III] line properties in two samples of radio-emitting narrow-line Seyfert 1 galaxies
1 Dipartimento di Fisica e Astronomia “G. Galilei”Università di Padova, Vicolo dell’Osservatorio 3, 35122 Padova, Italy
e-mail:
marco.berton.1@studenti.unipd.it
2 INAF−Osservatorio Astronomico di Brera, via E. Bianchi 46, 23807 Merate (LC), Italy
3 Las Campanas Observatory, Carnegie Institution of Washington, Colina El Pino Casilla 601, La Serena, Chile
Received: 24 July 2015
Accepted: 4 May 2016
The [O III] λλ 4959, 5007 lines are a useful proxy to test the kinematic of the narrow-line region (NLR) in active galactic nuclei (AGN). In AGN, and particularly in narrow-line Seyfert 1 galaxies (NLS1s) these lines often show few peculiar features, such as blue wings, often interpreted as outflowing component, and a shift − typically toward lower wavelengths − of the whole spectroscopic feature in some exceptional sources, the so-called blue outliers, which are often associated to strong winds. We investigated the incidence of these peculiarities in two samples of radio-emitting NLS1s, one radio-loud and one radio-quiet. We also studied a few correlations between the observational properties of the [O III] lines and those of the AGN. Our aim was to understand the difference between radio-quiet and radio-loud NLS1s, which may in turn provide useful information on the jet formation mechanism. We find that the NLR gas is much more perturbed in radio-loud than in radio-quiet NLS1s. In particular the NLR dynamics in γ-ray emitting NLS1s appears to be highly disturbed, and this might be a consequence of interaction with the relativistic jet. The less frequently perturbed NLR in radio-quiet NLS1s suggests instead that these sources likely do not harbor a fully developed relativistic jet. Nonetheless blue-outliers in radio-quiet NLS1s are observed, and we interpret them as a product of strong winds.
Key words: galaxies: Seyfert / galaxies: jets - quasars: emission lines
© ESO, 2016
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