2004A&A...427..465F

Query : 2004A&A...427..465F

2004A&A...427..465F - Astronomy and Astrophysics, volume 427, 465-483 (2004/11-4)

The B3-VLA CSS sample. IV. Kp-scale polarization properties.

FANTI C., BRANCHESI M., COTTON W.D., DALLACASA D., FANTI R., GREGORINI L., MURGIA M., STANGHELLINI C. and VIGOTTI M.

Abstract (from CDS):

We discuss VLA polarization measurements at 8.5, 4.9 and 1.4 GHz for the B3-VLA sample of Compact Steep-spectrum Sources (CSS). The measurements at the two higher frequencies were presented in a previous paper (Fanti et al., 2001A&A...369..380F), while those at 1.4GHz are from the NVSS. The study of the fractional polarization as a function of wavelength shows a variety of behaviours not always accounted for by the current simple models. In a large fraction of sources the integrated rotation angle appears to follow the λ2 law down to 1.4GHz, although this conclusion has to be treated with some care due to the small number of polarization measurements. For sources resolved at the two higher frequencies we find that a number exhibit asymmetries in the 8.5GHz fractional polarization, in depolarization and rotation angle. We discuss depolarization effects and rotation of the polarization angle. We find that Faraday depth effects are very strong within 2-3kpc of the nucleus, as found earlier by Cotton et al. (2003PASA...20...12C). A simple model for an external Faraday screen is able to account for the gross observed features. We also find that the Rotation Measure and the Faraday Dispersion appear to increase with the source red-shift.

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Journal keyword(s): galaxies: active - polarization - radio continuum: galaxies - quasars: general - ISM: structure

Simbad objects: 88

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Number of rows : 88
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 ICRF J000053.0+405401 G 00 00 53.08106320 +40 54 01.8096518     21.4     ~ 49 1
2 4C 38.01 G 00 06 20.6 +39 00 28           ~ 18 1
3 4C 44.02 rG 00 36 53.5794 +44 43 21.620           ~ 17 1
4 7C 003911.50+390856.00 G 00 41 54.9928 +39 25 21.212           ~ 19 1
5 7C 003924.39+372312.00 G 00 42 07.1994 +37 39 37.760           ~ 12 1
6 4C 39.03 Rad 00 42 17.4288 +40 09 48.522           ~ 25 1
7 87GB 003934.6+411250 AG? 00 42 18.7 +41 29 27           ~ 21 1
8 4C 42.03 Rad 00 44 39.2 +42 48 01           ~ 15 1
9 4C 37.03 G 00 52 16.9 +38 15 30   18       ~ 16 1
10 6C 011026+401028 QSO 01 13 17.7623461488 +40 26 12.627035268   20.0       ~ 24 1
11 4C 40.06 G 01 23 26.1156 +40 46 58.909           ~ 20 1
12 6C 012305+401256 G 01 25 59.1391 +40 28 36.452           ~ 12 1
13 6C 012834+392727 G 01 31 29.5 +39 42 58           ~ 15 1
14 6C 013735+400911 QSO 01 40 33.7548099360 +40 24 13.894124580   18.5       ~ 20 1
15 3C 51 G 01 43 32.9 +39 02 11           ~ 23 1
16 87GB 014453.1+431717 QSO 01 47 55.6214981184 +43 32 15.294840432           ~ 12 1
17 NVSS J015019+401730 Rad 01 50 19.5993 +40 17 30.173           ~ 15 1
18 4C 41.03 G 02 16 30.3 +41 31 51           ~ 18 1
19 87GB 022227.8+421633 G 02 25 32.1178 +42 29 42.069           ~ 10 1
20 NVSS J023138+410953 Rad 02 31 38.7473 +41 09 52.780           ~ 12 1
21 4C 40.10 rG 02 57 50.3 +40 50 33           ~ 15 1
22 4C 46.07 QSO 02 58 30.2477542392 +46 16 05.760607620   21.0       ~ 20 1
23 7C 070105.09+391554.00 QSO 07 04 31.3272603648 +39 11 23.360779860   18.7 18.7     ~ 23 1
24 7C 0703+4652 G 07 06 48.0722 +46 47 56.187   23.1       ~ 36 1
25 4C 39.17 AG? 07 25 50.0103 +39 17 25.563   19.1       ~ 27 1
26 NVSS J073243+433540 Rad 07 32 43.6916 +43 35 40.052           ~ 10 1
27 4C 46.16 QSO 07 47 43.5236 +46 18 57.384           ~ 34 1
28 87GB 074819.2+412322 Sy1 07 51 45.1534 +41 15 35.884   20.40 19.52     ~ 30 1
29 NVSS J075219+411551 Rad 07 52 19.8793 +41 15 53.201           ~ 12 1
30 4C 39.21 rG 07 58 08.8521 +39 29 27.705           ~ 27 1
31 4C 47.27 Sy1 08 04 13.8817034712 +47 04 42.876898140   20.64 20.34     ~ 47 1
32 4C 40.19 QSO 08 09 03.1418582400 +40 32 56.175467388   21.0       ~ 22 1
33 4C 40.20 Sy2 08 12 53.1122362128 +40 18 59.880992436   21.23 20.31     ~ 64 1
34 4C 46.17 G 08 14 30.2674 +45 56 39.426   19.3       ~ 27 1
35 87GB 081406.5+440902 G 08 17 35.4877 +43 59 34.449           ~ 14 1
36 4C 39.23B rG 08 25 23.6790 +39 19 45.707   17.0       ~ 43 1
37 ICRF J084331.6+421529 G 08 43 31.63747041 +42 15 29.5243582           ~ 35 1
38 4C 40.22 rG 08 59 59.5736 +40 24 35.087           ~ 20 1
39 6C 090206+414045 Q? 09 05 22.1891 +41 28 39.559   19.5       ~ 17 1
40 NVSS J093306+384150 rG 09 33 06.9294 +38 41 48.173           ~ 32 1
41 4C 42.30 G 09 38 16.5 +42 38 35           ~ 17 1
42 6C 095107+421525 QSO 09 54 12.5744244120 +42 01 09.187351572   21.51 21.00     ~ 27 1
43 87GB 095543.5+390233 G 09 58 44.269 +38 48 21.72           ~ 16 1
44 51P 81 G 10 10 24.7808 +41 59 33.022           ~ 14 1
45 NVSS J101154+420433 Rad 10 11 54.1742 +42 04 33.301           ~ 13 1
46 7C 101416.50+391624.00 QSO 10 17 14.107 +39 01 24.16   22.83       ~ 55 1
47 51P 126 QSO 10 19 48.1843 +44 08 24.845           ~ 14 1
48 4C 39.32 rG 10 28 44.2728990384 +38 44 36.859285032   18.4       ~ 47 1
49 87GB 102722.2+391311 G 10 30 16.5664 +38 57 53.823           ~ 14 1
50 NVSS J104206+421032 Rad 10 42 06.2105 +42 10 30.535           ~ 15 1
51 7C 104438.59+452442.92 AGN 10 47 33.7345 +45 08 52.523           ~ 18 1
52 7C 1049+3827 Sy2 10 52 11.7875 +38 11 43.913   20.9 20.9     ~ 36 1
53 6C 105511+402617 Q? 10 58 00.4065 +40 10 18.971           ~ 12 1
54 6C 112856+453123 QSO 11 31 38.9 +45 14 51   20.0       ~ 30 1
55 B3 1133+432 G 11 35 55.9948 +42 58 44.648           ~ 32 0
56 4C 42.33 G 11 38 59.1566 +41 48 39.243           ~ 15 1
57 NVSS J113934+380342 Rad 11 39 34.0053 +38 03 41.881           ~ 11 1
58 4C 46.23 QSO 11 43 39.600 +46 21 20.44   14.9       ~ 61 1
59 4C 45.22 G 11 46 15.2347 +45 20 38.263           ~ 17 1
60 4C 46.25 AGN 12 00 31.1534 +45 48 42.610           ~ 21 1
61 6C 115916+393547 G 12 01 49.9663 +39 19 11.038           ~ 22 1
62 87GB 120133.1+392914 BiC 12 04 06.8559 +39 12 17.655   19.5       ~ 32 1
63 4C 40.30 rG 12 07 06.2639 +39 54 39.369           ~ 20 1
64 6C 1212+3805 G 12 14 56.7 +37 48 51   23       ~ 28 1
65 87GB 121609.6+401731 G 12 18 36.956 +40 00 45.67           ~ 13 1
66 NVSS J121953+422951 Rad 12 19 53.8035 +42 29 52.014           ~ 11 1
67 4C 40.31 G 12 22 35.3017 +40 36 19.833           ~ 18 1
68 7C 122515.59+441716.00 Sy2 12 27 41.9944552429 +44 00 41.926757263           ~ 22 1
69 NVSS J123535+413707 rG 12 35 35.7115 +41 37 07.054           ~ 23 1
70 6C 124156+410806 BLL 12 44 19.9682592720 +40 51 36.652030020     19.43     ~ 36 1
71 ICRF J124449.1+404806 Sy1 12 44 49.1889 +40 48 06.150   19.0 19.0     ~ 78 1
72 4C 45.27 G 13 16 11.9038 +45 04 28.631           ~ 14 1
73 6C 134059+435829 Q? 13 43 05.9232 +43 43 23.318           ~ 13 1
74 4C 38.37 QSO 13 45 36.9420854112 +38 23 12.500014308     18.5     ~ 94 1
75 4C 43.31 rG 13 52 28.5862 +42 59 24.055           ~ 25 1
76 6C 143232+424933 G 14 34 27.8639 +42 36 20.058           ~ 15 0
77 87GB 144102.4+405726 G 14 42 59.355 +40 44 28.72           ~ 15 1
78 NVSS J144712+404745 rG 14 47 12.7625124264 +40 47 44.987437896           ~ 24 1
79 4C 41.29 Rad 14 51 07.2856 +41 54 41.806           ~ 17 1
80 87GB 145841.4+432121 G 15 00 29.990 +43 09 51.54           ~ 15 1
81 4C 44.42 G 23 03 45.3333 +44 39 06.103           ~ 11 1
82 4C 40.48 Rad 23 04 54.6202 +40 28 53.837           ~ 16 1
83 ICRF J230700.9+380242 G 23 07 00.99489679 +38 02 42.2332861   19.5       ~ 30 1
84 2MASS J23134816+4712149 Sy1 23 13 48.1687273848 +47 12 14.957305200   17.5 18.0     ~ 51 1
85 NVSS J232448+404022 Rad 23 24 48.6 +40 40 22           ~ 9 1
86 NVSS J233252+403037 Rad 23 32 52.9222 +40 30 37.216           ~ 11 1
87 4C 45.50 rG 23 51 27.8767 +45 18 30.628           ~ 12 1
88 4C 41.46 QSO 23 51 52.8774442920 +41 21 14.818610988   19.2       ~ 21 1

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