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The Spatial Distribution of Seyfert Galaxies

Published online by Cambridge University Press:  07 August 2017

A. P. Fairall
A. P. Fairall*
Affiliation:
Department of Astronomy, University of Cape Town, Rondebosch, 7700 South Africa

Extract

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For some years, this author has suspected that certain small regions of the southern sky were “good fishing grounds” for finding Seyfert galaxies. It is now possible to follow up this suspicion, not only on the sky (see also Fairall 1979, Petrosian and Turatto 1986) but in three-dimensional space (with redshift assumed to indicate distance). Figure 1 (overleaf) is a sample of the plots obtained from a database of some 6200 galaxies, south of Declination −17.5° for which redshifts are available - including 199 Seyfert galaxies (Fairall and Jones 1988). The data is not ideal, since it lacks statistical control; but experience has shown it nevertheless to be reliable for galaxies in general, whilst it is hoped that few, if any, higher-luminosity Seyfert nuclei remain undetected.

Type
Part 1: Surveys, Luminosity Functions, and Evolution
Information
Symposium - International Astronomical Union , Volume 134: Active Galactic Nuclei , 1989 , pp. 37 - 38
Copyright
Copyright © Kluwer 1989 

References

Fairall, A.P., 1979. Mon. Not. Astr. Soc. Sthn. Africa, 38, 68.Google Scholar
Fairall, A.P. and Jones, A., 1988. “Southern Redshifts - Catalogue and Plots” (Publ. Dept. Astr. Univ. Cape Town, No. 10).Google Scholar
Petrosion, A.P. and Turatto, M., 1986. Astron. and Astrophys. Suppl. Ser., 65, 349.Google Scholar
Balzano, V.A. and Weedman, D.W., 1982. Astrophys. J., 225, L1.CrossRefGoogle Scholar