Radio properties of Compact Steep Spectrum and GHz-Peaked Spectrum radio sources

TL;DR

This paper reviews the radio properties and physical characteristics of CSS and GPS radio sources, highlighting their role as early-stage, compact, powerful extragalactic objects with specific spectral features and interactions with their host galaxy environments.

Contribution

It provides a comprehensive review of the radio properties, physical characteristics, and environmental interactions of CSS and GPS sources, emphasizing their evolutionary significance.

Findings

CSS and GPS sources are compact, powerful, and have peaked spectra.

They are interpreted as early evolutionary stages of radio galaxies.

Interactions with host galaxy medium influence their radio emission.

Abstract

Compact steep spectrum (CSS) and GHz-peaked spectrum (GPS) radio sources represent a large fraction of the extragalactic objects in flux density-limited samples. They are compact, powerful radio sources whose synchrotron peak frequency ranges between a few hundred MHz to several GHz. CSS and GPS radio sources are currently interpreted as objects in which the radio emission is in an early evolutionary stage. In this contribution I review the radio properties and the physical characteristics of this class of radio sources, and the interplay between their radio emission and the ambient medium of the host galaxy.