CSS Radio Sources and their Optical Characteristics

Polarisation in CSS/GPS radio sources

The polarisation properties of the intrinsically small (< 20 kpc) radio sources are briefly discussed. At centimetric and decimetric wavelengths, substantial polarised emission is often detected in quasars and, at a lower level, in radio sources identified with galaxies with projected linear sizes in excess of a few kpc. The projected linear size at which some polarised emission is detected dec...

Jet propagation and the asymmetries of CSS radio sources

As Compact Steep Spectrum radio sources have been shown to be more asymmetrical than larger sources of similar powers, there is a high probability that they interact with an asymmetric medium in the central regions of the host elliptical galaxy. We consider a simple analytical model of the propagation of radio jets through a reasonable asymmetric environment and show that they can yield the ran...

High Redshift Css Radio Galaxies

We discuss CSS radio galaxies from 2 samples of radio sources. The rst sample is a complete sample of 28 3CR galaxies with redshifts in the range 0:6 < z < 1:8 for which we have HST, UKIRT and VLA imaging data. The 2 CSS galaxies contained in this sample, 3C49 and 3C241, appear to be less active than galaxies with radio sizes of order 50{100 kpc, but similar in activity to galaxies with radio s...

Spectral Ages of CSOs and CSS Sources

This paper deals with the spectral ageing study of a representative sample of compact symmetric objects (CSOs) and compact steep spectrum (CSS) sources. Observations reveal a distinctive high-frequency steepening of the radio spectra of many of these sources. The existence of such a spectral feature is expected or may be naturally interpreted in terms of radiative ageing of synchrotron emitting...

2 FIR properties of CSS / GPS radio