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A Study of the Seyfert Galaxy NGC 4151

Published online by Cambridge University Press:  25 April 2016

J. B. Oke  and
Wallace L. W. Sargent
J. B. Oke
Affiliation:
California Institute of Technology
Wallace L. W. Sargent
Affiliation:
Mount Wilson and Palomar Observatories
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Extract

The small group of known Seyfert galaxies (Seyfert 1943) is of interest because it is clear that some violent activity is occurring in the nucleus, and some of the properties suggest a relationship with quasi-stellar sources. The spectrum of a Seyfert galaxy consists of strong, often very broad, emission lines superposed on a continuous spectrum which in some cases shows no absorption-line features. Two of the galaxies, NGC 1068 and 1275, are radio galaxies and the latter is known to be variable at radio frequencies (Dent 1966).

Type
Invited Papers
Information
Publications of the Astronomical Society of Australia , Volume 1 , Issue 1 , January 1967 , pp. 7
Copyright
Copyright © Astronomical Society of Australia 1967

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References

Aller, L. H., Bowen, I. S., and Minkowski, R., 1955.—Ap. J., 122, 62.Google Scholar
Dent, W. A., 1966.—Ap. J., 144, 843.Google Scholar
Parker, R. A. R., 1964.—Ap. J., 139, 208.Google Scholar
Seyfert, C. K., 1943.—Ap. J., 97, 28.Google Scholar