We study a sample of narrow-line Seyfert 1 galaxies (NLS1) in their optical and radio features to understand the differences between their radio silent, radio-loud, and radio-quiet subclasses. We first show that the different redshift and mass distributions of radio-loud and radio-quiet NLS1s could be ascribed to observational biases. We then present a geometrical model according to which most of the different observational features of radio-loud and radio-quiet NLS1s are ascribed to the orientation of an intrinsically structured jet. We estimate the fraction of intrinsically jetted sources among NLS1s that justifies the observed radio-detected population. Noticeably, under the assumptions of the geometrical model, we derive a fraction of jetted sources significantly larger than in standard AGN.

Sbarrato, T., Dotti, M., Ghirlanda, G., Tavecchio, F. (2018). Study of the orientation of narrow-line Seyfert i. ASTRONOMY & ASTROPHYSICS, 616, A43 [10.1051/0004-6361/201732451].

Study of the orientation of narrow-line Seyfert i

Sbarrato, T;Dotti, M;Ghirlanda, G;
2018

Abstract

We study a sample of narrow-line Seyfert 1 galaxies (NLS1) in their optical and radio features to understand the differences between their radio silent, radio-loud, and radio-quiet subclasses. We first show that the different redshift and mass distributions of radio-loud and radio-quiet NLS1s could be ascribed to observational biases. We then present a geometrical model according to which most of the different observational features of radio-loud and radio-quiet NLS1s are ascribed to the orientation of an intrinsically structured jet. We estimate the fraction of intrinsically jetted sources among NLS1s that justifies the observed radio-detected population. Noticeably, under the assumptions of the geometrical model, we derive a fraction of jetted sources significantly larger than in standard AGN.
Articolo in rivista - Articolo scientifico
Black hole physics; Galaxies: active; Galaxies: jets; Galaxies: Seyfert; Astronomy and Astrophysics; Space and Planetary Science
English
2018
616
A43
A43
open
Sbarrato, T., Dotti, M., Ghirlanda, G., Tavecchio, F. (2018). Study of the orientation of narrow-line Seyfert i. ASTRONOMY & ASTROPHYSICS, 616, A43 [10.1051/0004-6361/201732451].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/216839
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