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Dusty Active Galaxies

Published online by Cambridge University Press:  25 July 2014

Nora Andreasian-Thomas
Nora Andreasian-Thomas*
Affiliation:
Thomas Research Institute, USA E-mail: nora_ta@yahoo.com
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Abstract

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Most astronomers know about B. E. Markarians discovery and further study of galaxies with UV excess. It is less known that in 1963 Markarian drew attention to a small group of galaxies with color index-spectral type discrepancy. Early spectral type of these galaxies is combined with large color index (e.g. M82). Later studies showed that galaxies with large intrinsic color indices (CI ≥ 0.85) exhibit properties typical for active galaxies - galaxies with “red excess” are as active as galaxies with UV excess.

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S304: Multiwavelength AGN Surveys and Studies , October 2013 , pp. 65
Copyright
Copyright © International Astronomical Union 2014