2008A&A...479..409O


Query : 2008A&A...479..409O

2008A&A...479..409O - Astronomy and Astrophysics, volume 479, 409-415 (2008/2-4)

Constraining the nature of high frequency peakers. II. Polarization properties.

ORIENTI M. and DALLACASA D.

Abstract (from CDS):

The ``bright'' High Frequency Peakers (HFPs) sample is a mixture of blazars and intrinsically small and young radio sources. We investigate the polarimetric characteristics of 45 High Frequency Peakers, from the ``bright'' HFP sample, in order to have a deeper knowledge of the nature of each object, and to construct a sample made of genuine young radio sources only. Simultaneous VLA observations carried out at 22.2, 15.3, 8.4 and 5.0GHz, together with the information at 1.4 GHz provided by the NVSS at an earlier epoch, have been used to study the linearly polarized emission. From the analysis of the polarimetric properties of the 45 sources we find that 26 (58%) are polarized at least at one frequency, while 17 (38%) are completely unpolarized at all frequencies. We find a correlation between fractional polarization and the total intensity variability. We confirm that there is a clear distinction between the polarization properties of galaxies and quasars: 17 (66%) quasars are highly polarized, while all the 9 galaxies are either unpolarized (<0.2%) or marginally polarized with fractional polarization below 1%. This suggests that most HFP candidates identified with quasars are likely to represent a radio source population different from young radio objects.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: quasars: general - polarization - radiation mechanisms: non-thermal

Simbad objects: 50

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Number of rows : 50
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 ICRF J000319.3+212944 Sy2 00 03 19.3504089696 +21 29 44.505854592   21.005 20.580 19.650   ~ 41 1
2 QSO B0002+0507 BLL 00 05 20.2155845040 +05 24 10.802758572   16.56 16.21 16.26   ~ 179 1
3 ICRF J003732.1+080813 Bz? 00 37 32.1971799 +08 08 13.057057       22.31   ~ 23 1
4 QSO B0108+388 Bla 01 11 37.31680 +39 06 28.1039     22 22.000   ~ 247 1
5 ICRF J011638.0+242253 Bz? 01 16 38.0676562 +24 22 53.724468       21.90   ~ 17 0
6 3C 48 QSO 01 37 41.2996631208 +33 09 35.080388820   16.62 16.20     ~ 2693 2
7 QSO J0217+0144 QSO 02 17 48.9544520496 +01 44 49.693296336   16.74 16.09 18.51 13.29 ~ 395 1
8 ICRF J032915.3+351005 BLL 03 29 15.3548503584 +35 10 05.989666620       17.60   ~ 39 1
9 QSO J0357+2319 QSO 03 57 21.6099522120 +23 19 53.824638900       18.78   ~ 37 1
10 ICRF J042805.8+325952 QSO 04 28 05.8087390 +32 59 52.043968       21.39   ~ 42 0
11 PMN J0519+0848 Rad 05 19 10.8111308 +08 48 56.734522           ~ 20 1
12 ICRF J062518.2+444001 BLL 06 25 18.2653266264 +44 40 01.624515204     16.80 18.71   ~ 83 1
13 6C 063338+593631 Bz? 06 38 02.8719115 +59 33 22.213886           ~ 34 1
14 QSO B0636+68 BLL 06 42 04.2572705040 +67 58 35.620484340     16.46 16.01   ~ 213 1
15 7C 064253.00+445430.00 QSO 06 46 32.0253442416 +44 51 16.588600488   19.57 18.49 18.64   ~ 334 1
16 QSO B0646+600 QSO 06 50 31.2532631952 +60 01 44.543070624   18.9 18.6 19.65   ~ 111 1
17 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4099 2
18 QSO B1333+459 QSO 13 35 21.9623576640 +45 42 38.232772128   18.30 18.22 17.67   ~ 94 0
19 4C 58.26 Bz? 13 35 25.9285191 +58 44 00.291595       21.91   ~ 50 1
20 QSO B1404+286 BLL 14 07 00.3941769384 +28 27 14.692128372   16.13 15.35 10.29   ~ 729 2
21 ICRF J141236.3+133438 Bz? 14 12 36.3726447 +13 34 38.152733           ~ 25 0
22 QSO B1422+2309 BLL 14 24 38.09400 +22 56 00.5900   16.77 15.84 14.79   ~ 433 1
23 [PBW92] 1422+231 gLS 14 24 38.09400 +22 56 00.5900   16.77 15.84 14.79   ~ 356 0
24 QSO J1430+1043 QSO 14 30 09.7389618072 +10 43 26.857127172     18.5 18.67   ~ 84 1
25 ICRF J145738.1+074954 QSO 14 57 38.1294678144 +07 49 54.696380520   21.26 20.74 19.37   ~ 36 1
26 ICRF J150506.4+032630 Sy1 15 05 06.4772159496 +03 26 30.819339636   19.02 18.62 17.72   ~ 220 1
27 ICRF J151141.2+051809 Sy1 15 11 41.2665365784 +05 18 09.243401724   18.49 17.80 13.95   ~ 98 0
28 QSO J1526+6650 QSO 15 26 42.8744737248 +66 50 54.644414316   18.26 17.87 17.24   ~ 50 0
29 ICRF J160341.9+110548 BLL 16 03 41.9312847576 +11 05 48.680171916   18.41 17.82 16.66   ~ 44 1
30 QSO B1614+051 QSO 16 16 37.5569529792 +04 59 32.744135148   19.60 19.17 19.49   ~ 180 2
31 [VV96] J162304.5+662401 QSO 16 23 04.5201307656 +66 24 01.069442928   19.477   17.430   ~ 58 1
32 7C 1645+6335 QSO 16 45 58.5526926216 +63 30 10.922944752   19.87 19.77 19.5   ~ 55 1
33 3C 351.0 Sy1 17 04 41.3742408840 +60 44 30.520617000   15.65 15.40 15.30   ~ 734 1
34 ICRF J173549.0+504911 Bz? 17 35 49.00517 +50 49 11.5659       22.40   ~ 45 1
35 7C 175844.60+384828.00 QSO 18 00 24.7653461736 +38 48 30.697069572   17.8 17.8 17.04   ~ 139 1
36 ICRF J181143.1+170457 BLL 18 11 43.1835584352 +17 04 57.257698980       18.98   ~ 28 0
37 QSO J1840+3900 QSO 18 40 57.1546417320 +39 00 45.742293036     19.20 19.14   ~ 48 1
38 QSO B1848+283 QSO 18 50 27.5898721080 +28 25 13.155071160   17.1 17 17.16   ~ 77 1
39 ICRF J185527.7+374256 QSO 18 55 27.7068244 +37 42 56.965928       20.20   ~ 33 1
40 4C 73.18 BLL 19 27 48.4947009120 +73 58 01.572558816     15.5 15.11   ~ 507 2
41 ICRF J202135.2+051504 QSO 20 21 35.2812075 +05 15 04.778183       21.70   ~ 36 0
42 [VV96] J202456.5+171814 QSO 20 24 56.5636552128 +17 18 13.196337192   17.5 19.5 17.51   ~ 45 1
43 QSO B2059+034 QSO 21 01 38.8344870144 +03 41 31.320939192   18.13 17.78 17.68   ~ 157 1
44 QSO J2123+0535 QSO 21 23 44.5173734952 +05 35 22.093702692   18.3 17.5 19.86   ~ 271 1
45 ICRF J220330.9+100742 Bz? 22 03 30.9525909 +10 07 42.586730       21.38   ~ 36 0
46 ICRF J220752.8+165217 QSO 22 07 52.8660259608 +16 52 17.803405956   19.5 19.5 19.98   ~ 40 1
47 BWE 2209+2340 QSO 22 12 05.9664991416 +23 55 40.543886604   19   19.69   ~ 203 1
48 BWE 2254+0227 QSO 22 57 17.5630172064 +02 43 17.509646100   18.04 17.96 18.45   ~ 150 1
49 BWE 2318+0457 QSO 23 20 44.8566627408 +05 13 49.950278148   18.6 19.0     ~ 144 1
50 QSO B2327+335 QSO 23 30 13.7378153880 +33 48 36.469525752     18.5 18.71   ~ 44 1

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2022.08.18-03:01:59

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