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Issue A&A
Volume 449, Number 1, April I 2006
Page(s) 49 - 60
Section Extragalactic astronomy
DOI http://dx.doi.org/10.1051/0004-6361:20053945

A&A 449, 49-60 (2006)
DOI: 10.1051/0004-6361:20053945

The B3-VLA CSS sample

VI. VLA images at 2 cm
A. Rossetti1, C. Fanti1, 2, R. Fanti1, 2, D. Dallacasa1, 3 and C. Stanghellini1

1  Istituto di Radioastronomia - INAF, via Gobetti 101, 40129, Bologna, Italy
    e-mail: rossetti@ira.cnr.it
2  Dipartimento di Fisica, Università degli Studi, via Irnerio 46, 40126 Bologna, Italy
3  Dipartimento di Astronomia, Università degli Studi, via Ranzani 1, 40127 Bologna, Italy

(Received 29 July 2005 / Accepted 9 November 2005 )

Abstract
Aims.New radio observations are presented for a sample of 56 Compact Steep Spectrum (CSS) radio sources from the B3-VLA CSS sample.
Methods.We used the VLA A-configuration observation at 2 cm to obtain high-frequency, high-resolution data.
Results.The majority (85%) of sources have a double morphology with a number of them showing a large asymmetry in terms of their component flux densities and/or component arm ratio. These new data have revealed 27 cores and core candidates. Three of the sources have a core-jet morphology and the morphologies of a few objects ($\le$$10\%$) are still ambiguous. The integrated radio spectra, over a frequency range from 0.16 to 15 GHz, show good agreement with a "continuous injection model" for $\ge$$85\%$ of the sources.


Key words: galaxies: active -- galaxies: nuclei -- radio continuum: galaxies -- galaxies: quasars: general

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© ESO 2006


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