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Abstract  Based on the FIRST and SDSS catalogues a flux density limited sample of weak Compact Steep Spectrum (CSS) sources with radio luminosity below 10 26 WHz –1  at 1.4 GHz has been constructed. Our previous multifrequency observations of CSS sources have shown that low luminosity small‐scale objects can be strong candidates for compact faders. This finding supports the idea that some small‐size radio sources are short‐lived phenomena because of a lack of significant fuelling. They never ‘grow up’ to become FRI or FRII objects. This new sample marks the start of a systematic study of the radio properties and morphologies of the population of low luminosity compact (LLC) objects. An investigation of this new sample should also lead to a better understanding of compact faders. In this paper, the results of the first stage of the new project – the L‐band MERLIN observations of 44 low luminosity CSS sources are presented (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

A survey of Low Luminosity Compact sources