NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-08-17 T10:32:58 PDT
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For refcode 1998MNRAS.301.1019R:
Retrieve 113 NED objects in this reference.
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NED Abstract

Copyright by Royal Astronomical Society. 1998MNRAS.301.1019R Seyfert galaxies and the radio-far-infrared correlation A. L. Roy, R. P. Norris, M.,I. Kesteven, E. R. Troup and J. E. Reynolds Accepted 1998 August 10. Received 1998 July 20: in original form 1998 March 31 ABSTRACT We have observed a sample of 149 Seyfert galaxies and radio-quiet quasars at 13 cm with both a 275-km radio interferometer and the 6-km compact array of the Australia Telescope. The high-resolution observations searched for the presence of compact, high-brightness-temperature radio emission from the active nucleus. The low-resolution observations measured the total radio emission from the galaxy disc and Seyfert core and lobes. From these we draw the following conclusions. (i) Seyfert galaxies that lack compact radio cores display a correlation between radio and far-infrared (FIR) emission similar to the correlation displayed by normal spirals, albeit with greater scatter. The correlation is found to be intrinsic and is not an artefact of the richness effect. (ii) A very different radio-FIR correlation is displayed by those Seyferts that harbour compact radio cores. These tend to be more radio-loud than either normal spirals or the Seyferts that lack compact cores. The compact core emission thus seems to be responsible for the generally poor radio-FIR correlation displayed by Seyfert galaxies. (iii) The radio-FIR correlation is not significantly improved by subtracting off the 0.1 -arcsec (20- to 200-pc) compact radio emission from the total radio emission. This suggests that the emission from the active galactic nucleus has significant structure on scales larger than 0.1 arcsec. Perhaps these structures are the `linear' radio features that have been seen previously in Seyfert nuclei. Key words: galaxies: active - galaxies: nuclei - galaxies: Seyfert - galaxies: starburst - infrared: galaxies - radio continuum: galaxies.
Retrieve 113 NED objects in this reference.
Please click here for ADS abstract

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