The determination of the spectral turnover in faint Compact Steep-Spectrum radio sources using the VLA at 74 MHz

¹ Leiden Observatory, PO Box 9513, 2300 RA Leiden, The Netherlands
² Joint Institute for VLBI in Europe, PO Box 2, 7990 AA Dwingeloo, The Netherlands
³ Institute for Astronomy, Royal Observatory, Blackford Hill Edinburgh, EH9 3HJ, UK
⁴ National Radio Astronomy Observatory, PO Box O, Socorro, NM 87801, USA

Corresponding author: I. A. G. Snellen, ignas@roe.ac.uk

Received: 3 December 2002
Accepted: 19 February 2003

Abstract

We carried out VLA observations in A configuration at 74 MHz of a new sample of faint Compact Steep-Spectrum (CSS) radio sources as part of a comprehensive project to study the nature and evolution of peaked-spectrum radio sources. In conjunction with higher frequency spectral information this has enabled us to determine the peak frequency and peak flux density of the spectral turnover for 35 faint CSS radio sources. Spectra are presented. An analysis is given of the quality of the images and their suitability for integrated intensity measurements of the CSS radio sources.