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Soon After the Birth of Radio Sources

Published online by Cambridge University Press:  13 May 2016

I. Owsianik ,
J.E. Conway  and
A.G. Polatidis
I. Owsianik
Affiliation:
MPIfR, Auf dem Hügel 69, 53121 Bonn, Germany
J.E. Conway
Affiliation:
OSO, S-43992 Onsala, Sweden
A.G. Polatidis
Affiliation:
OSO, S-43992 Onsala, Sweden

Abstract

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Compact Symmetric Objects (CSOs) represent an early stage in the life of radio galaxies. Our kinematic studies over a 20 year timebase have unambiguously demonstrated that they expand fast and that the radio activity is recently born. The CSO evolution with time is however still a matter of investigation. If they are progenitors of the “classical double” radio sources, then in order to fit the the observed statistics of radio sources, CSOs must have decrease their luminosity and expansion speed with time. It is also possible that CSOs represent a phase of periodic activity of the central engine; in this case the presence of the old activity in the form of extended weak emission, should be observed.

Type
The Inner Regions of Galaxies
Information
Symposium - International Astronomical Union , Volume 205: Galaxies and their Constituents at the Highest Angular Resolutions , 2001 , pp. 112 - 113
Copyright
Copyright © Astronomical Society of the Pacific 2001 

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