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Date and Time of the Query: 2019-06-20 T04:14:52 PDT
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For refcode 2001MNRAS.325..737T:
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NED Abstract

Copyright by Royal Astronomical Society. 2001MNRAS.325..737T High-resolution radio observations of Seyfert galaxies in the extended 12-micron sample - II. The properties of compact radio components Andy Thean, Alan Pedlar, Marek J. Kukula, Stefi A. Baum and Christopher P. O'Dea Accepted 2001 March 5. Received 2001 March 5; in original form 2000 August 30 ABSTRACT We discuss the properties of compact nuclear radio components in Seyfert galaxies from the extended 12-micron AGN sample of Rush et al. Our main results can be summarized as follows. Type 1 and type 2 Seyferts produce compact radio components which are indistinguishable in strength and aspect, indicating that their central engines are alike, as proposed by the unification model. Infrared IRAS fluxes are more closely correlated with low-resolution radio fluxes than high-resolution radio fluxes, suggesting that they are dominated by kiloparsec-scale, extranuclear emission regions; extranuclear emission may be stronger in type 2 Seyferts. Early-type Seyfert galaxies tend to have stronger nuclear radio emission than late-type Seyfert galaxies. V-shaped extended emission-line regions, indicative of 'ionization cones', are usually found in sources with large, collimated radio outflows. Hidden broad lines are most likely to be found in sources with powerful nuclear radio sources. Type 1 and type 2 Seyferts selected by their IRAS 12-micron flux densities have well-matched properties. Keywords: galaxies: active - galaxies: Seyfert - galaxies: statistics - infrared: galaxies - radio continuum: galaxies.
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