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 (≤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 ≥85% of the sources.
The B3-VLA CSS sample. VI. VLA images at 2 cm / Rossetti A.; Fanti C.; Fanti R.; Dallacasa D.; Stanghellini C.. - In: ASTRONOMY & ASTROPHYSICS. - ISSN 0004-6361. - STAMPA. - 449:(2006), pp. 49-60. [10.1051/0004-6361:20053945]
The B3-VLA CSS sample. VI. VLA images at 2 cm
GIOVANNINI, CARLA;FANTI, ROBERTO;DALLACASA, DANIELE;
2006
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 (≤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 ≥85% of the sources.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
