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Small Steep-Spectrum Sources: Jets Colliding with Ambient Gas

Published online by Cambridge University Press:  03 August 2017

Wil van Breugel
Affiliation:
Radio Astronomy Laboratory, UC Berkeley, USA
Nan Ren-dong
Affiliation:
Visiting Astr. at NFTA, Dwingeloo, The Netherlands
R. T. Schilizzi
Affiliation:
NFRA, Dwingeloo, The Netherlands
C. Fanti
Affiliation:
Istituto di Radioastronomia, Bologna, Italy
R. Fanti
Affiliation:
Istituto di Radioastronomia, Bologna, Italy

Extract

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A large fraction of sources in flux limited radio samples consists of compact steep spectrum (CSS) sources (Fanti et al. 1987). These objects have their dominant emission on kiloparsec scales and are found in a variety of active galaxies, including Seyfert II's, peculiar galaxies and quasars. Observations of very nearby CSS sources have shown good correlations between their complex radio structures and optical emission-line gas suggesting violent interactions between jets and dense gas in their ambient interstellar media (van Breugel et al. 1984). Similar jet/gas interactions may occur in more distant and more powerful CSS sources.

Type
Extragalactic
Copyright
Copyright © Reidel 1988 

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