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Multiwavelength Properties of Narrow-line Seyfert 1's: Studying One Extreme of the AGN Primary Eigenvector

Published online by Cambridge University Press:  25 May 2016

Paul Hirst ,
Duncan Law-Green  and
Martin Ward
Paul Hirst
Affiliation:
X-ray Astronomy Group, Department of Physics & Astronomy, University of Leicester, Leicester LE1 7RH, UK
Duncan Law-Green
Affiliation:
X-ray Astronomy Group, Department of Physics & Astronomy, University of Leicester, Leicester LE1 7RH, UK
Martin Ward
Affiliation:
X-ray Astronomy Group, Department of Physics & Astronomy, University of Leicester, Leicester LE1 7RH, UK

Abstract

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Narrow Line Seyfert 1 galaxies (NLS1s) are an important subclass of radio quiet AGN having extreme optical and X-ray spectroscopic properties. Their relationship to other types of Seyferts remains unclear. NLS1s exhibit many characteristics of Seyfert 1 AGN, but their optical spectra show narrow permitted lines, and some high ionization species. This may result from us viewing them close to ‘pole-on' orientation with respect to an inner torus geometry. We present comparisons of the radio and X-ray properties of NLS1s with those of the 12μm and CfA Seyfert samples.

Type
I. Observational Properties of AGN
Information
Symposium - International Astronomical Union , Volume 194: Activity in Galaxies and Related Phenomena , 1999 , pp. 77 - 78
Copyright
Copyright © Astronomical Society of the Pacific 1999 

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