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Issue A&A
Volume 402, Number 1, April IV 2003
Page(s) 171 - 179
Section Galactic structure and dynamics
DOI http://dx.doi.org/10.1051/0004-6361:20030232



A&A 402, 171-179 (2003)
DOI: 10.1051/0004-6361:20030232

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

W. Tschager1, R. T. Schilizzi2, 1, H. J. A. Röttgering1, I. A. G. Snellen3, G. K. Miley1 and R. A. Perley4

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

(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.


Key words: radio continuum: galaxies -- galaxies: active -- galaxies: evolution

Offprint request: I. A. G. Snellen, ignas@roe.ac.uk

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© ESO 2003


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