The B3-VLA CSS sample VII. WSRT polarisation observations and the ambient Faraday medium properties revisited

被引：0
|
作者：
Rossetti, A. [1 ]
Dallacasa, D. [1 ,2 ]
Fanti, C. [1 ]
Fanti, R. [1 ]
MacK, K.-H. [1 ]
机构：
[1] Istituto di Radioastronomia, INAF, via Gobetti 101, 40129 Bologna, Italy
[2] Dipartimento di Astronomia, Università di Bologna, via Ranzani 1, 40127 Bologna, Italy
来源：
Astronomy and Astrophysics | 2008年 / 487卷 / 03期
关键词：
We present new polarisation observations at 13 cm; acquired using theWesterbork Synthesis Radio Telescope (WSRT); of; 65; sources; from the B3-VLA sample of Compact Steep-Spectrum sources. These new data are combined with our VLA polarisation data; at; 3.6; 6; and; 21; cm; presented in a previous paper. Due to the multi-channel frequency capabilities of the WSRT; these new 13 cm observations enable a more reliable determination of integrated Rotation Measures; and of depolarisation behaviour with wavelength. The new data are inconsistent with the depolarisation models that we used earlier; and we propose an alternative model which seems to work properly. We also revise our previous model for the external Faraday screen; and its dependence on the source redshift. © ESO 2008;
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页码：865 / 883
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