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The Evolution of Compact Steep-Spectrum Sources

Published online by Cambridge University Press:  12 April 2016

S. Jeyakumar  and
D. J. Saikia
S. Jeyakumar
Affiliation:
National Centre for Radio Astrophysics, Tata Institute of Fundamental Research, Pune 411 007, India
D. J. Saikia
Affiliation:
National Centre for Radio Astrophysics, Tata Institute of Fundamental Research, Pune 411 007, India

Abstract

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We used our high-resolution radio images made with VLA of a large number of compact steep-spectrum (CSS) sources selected from well-defined samples of radio sources and the radio data of these samples to explore the evolution of CSSs with time. We suggest that the majority of CSSs are likely to be young sources advancing outwards through an asymmetric inhomogeneous environment to form the larger ones. We examine the symmetry parameters of both CSSs and larger sources and compare these with both analytical and numerical estimates of propagation of jets through an asymmetric environment. We also examine the consistency of CSSs with the unified scheme for radio galaxies and quasars.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 164: Radio Emission from Galactic and Extragalactic Compact Sources , 1998 , pp. 295 - 296
Copyright
Copyright © Astronomical Society of the Pacific 1998

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