The B3-VLA CSS sample

VI. VLA images at 2 cm

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 (≤) 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 ≥ of the sources.