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3.14. Infrared variations of active galaxies: what they tell us

Published online by Cambridge University Press:  25 May 2016

I.S. Glass
I.S. Glass*
Affiliation:
South African Astronomical Observatory, PO Box 9, Observatory 7935, South Africa

Extract

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Little is known about the long-term infrared variations of Seyfert galaxies. Are they large or small, fast or slow, regular or irregular? Do they possess variable components hidden at visible wavelengths? Can their variational time-scales give us information about activity on sub-milliarcsecond spatial scales? Do the infrared measurements show well-defined flux variation gradients? Is the infrared flux delayed with respect to changes in the output of the central engine? And do the infrared variability studies support the “Unified Model”?

Type
Part I. Stellar Cluster, Star Formation
Information
Symposium - International Astronomical Union , Volume 184: The Central Regions of the Galaxy and Galaxies , 1998 , pp. 117 - 118
Copyright
Copyright © Kluwer 1998