Abstract
SEVERAL lists of galaxies with ultraviolet continua have been published by Markarian1–3 and Markarian and Lipovetsky4. Approximately 10% of these objects are spectroscopically similar to Seyfert galaxies. Sargent5 has pointed out that Markarian's method of searching with an objective prism tends to select those Seyfert galaxies where the nuclei, with their characteristic blue colours, contribute most of the light. Thus, the Seyfert galaxies on Markarian's lists tend to have more luminous nuclei than the classical Seyferts.
Similar content being viewed by others
Article PDF
References
Markarian, B. E., Astrofizika, 3, 55 (1967).
Markarian, B. E., Astrofizika, 5, 443 (1969).
Markarian, B. E., Astrofizika, 5, 581 (1969).
Markarian, B. E., and Lipovetsky, V. A., Astrofizika, 7, 511 (1971).
Sargent, W. L. W., Astrophys. J., 173, 7 (1972).
Arakelian, M. A., Dibai, E. A., Esipov, V. F., and Markarian, B. E., Astrofizika, 7, 177 (1971).
Zwicky, F., and Herzog, E., Catalogue of Galaxies and Cluster of Galaxies, 4 (California Institute of Technology, 1968).
Adams, T. F., and Weedman, D. W., Astrophys. J. Lett., 173, L109 (1972).
Dixon, R. S., Astrophys. J. Supp., 20, 1 (1970).
Brundage, R. K., Dixon, R. S., Ehman, J. R., and Kraus, J. D., Astron. J., 76, 777 (1971).
Kleinmann, D. E., and Low, F. J., Astrophys. J. Lett., 159, L165 (1970).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
YOUNG, E., KNACKE, R. & JOYCE, R. Physical Sciences: Infrared Photometry of Markarian 231. Nature 238, 263 (1972). https://doi.org/10.1038/238263a0
Received:
Issue Date:
DOI: https://doi.org/10.1038/238263a0
This article is cited by
-
On the nature of galaxies with ultraviolet continuum
Astrophysics (1975)
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.