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


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.22CEST12:11:32

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 - 2019
#notes
1 ICRF J000319.3+212944 Sy2 00 03 19.35003510 +21 29 44.5075377   21.005 20.580 19.650   ~ 38 1
2 QSO B0002+0507 QSO 00 05 20.2154590 +05 24 10.802383   16.56 16.21 16.26   ~ 167 1
3 ICRF J003732.1+080813 Bz? 00 37 32.19717614 +08 08 13.0574396       22.31   ~ 20 1
4 QSO B0108+388 Bla 01 11 37.31680 +39 06 28.1039     22 22.000   ~ 231 1
5 ICRF J011638.0+242253 Bz? 01 16 38.06769457 +24 22 53.7240499       21.90   ~ 14 0
6 3C 48 QSO 01 37 41.2995845985 +33 09 35.079126038   16.62 16.20     ~ 2431 2
7 QSO J0217+0144 QSO 02 17 48.95475182 +01 44 49.6990704   16.74 16.09 18.51 13.29 ~ 361 1
8 ICRF J032915.3+351005 BLL 03 29 15.3547073283 +35 10 05.988545017       17.60   ~ 31 1
9 QSO J0357+2319 QSO 03 57 21.60988566 +23 19 53.8255336       18.78   ~ 32 1
10 ICRF J042805.8+325952 QSO 04 28 05.80872626 +32 59 52.0437647       21.39   ~ 35 0
11 PMN J0519+0848 Rad 05 19 10.81112767 +08 48 56.7344975           ~ 17 1
12 ICRF J062518.2+444001 BLL 06 25 18.2651888885 +44 40 01.625648996     16.80 18.71   ~ 71 1
13 6C 063338+593631 Bz? 06 38 02.87192935 +59 33 22.2146823           ~ 29 1
14 QSO B0636+68 QSO 06 42 04.2571549110 +67 58 35.621670643     16.46 16.01   ~ 198 1
15 7C 064253.00+445430.00 QSO 06 46 32.02599463 +44 51 16.5901237   19.57 18.49 18.64   ~ 314 1
16 QSO B0646+600 QSO 06 50 31.25435513 +60 01 44.5558800   18.9 18.6 19.65   ~ 101 1
17 3C 286 Sy1 13 31 08.2885060664 +30 30 32.960825108   17.51 17.25     ~ 3615 1
18 QSO B1333+459 QSO 13 35 21.9625685328 +45 42 38.233185530   18.30 18.22 17.67   ~ 86 0
19 4C 58.26 Bz? 13 35 25.92845073 +58 44 00.2914463       21.91   ~ 44 1
20 QSO B1404+286 BLL 14 07 00.3933203928 +28 27 14.695133019   16.13 15.35 10.29   ~ 657 2
21 ICRF J141236.3+133438 Bz? 14 12 36.37264534 +13 34 38.1531137           ~ 21 0
22 QSO B1422+2309 QSO 14 24 38.09400 +22 56 00.5900   16.77 15.84 14.79   ~ 407 1
23 [PBW92] 1422+231 gLS 14 24 38.09400 +22 56 00.5900   16.77 15.84 14.79   ~ 354 0
24 QSO J1430+1043 QSO 14 30 09.73878998 +10 43 26.8621725     18.5 18.67   ~ 73 1
25 ICRF J145738.1+074954 QSO 14 57 38.12871198 +07 49 54.7151602   21.26 20.74 19.37   ~ 29 1
26 ICRF J150506.4+032630 Sy1 15 05 06.47715917 +03 26 30.8126616   19.02 18.62 17.72   ~ 185 1
27 ICRF J151141.2+051809 Sy1 15 11 41.26654675 +05 18 09.2597600   18.49 17.80 13.95   ~ 77 0
28 QSO J1526+6650 QSO 15 26 42.8755263333 +66 50 54.641671782   18.26 17.87 17.24   ~ 46 0
29 ICRF J160341.9+110548 BLL 16 03 41.9312784330 +11 05 48.681252147   18.41 17.82 16.66   ~ 33 1
30 QSO B1614+051 QSO 16 16 37.55681502 +04 59 32.7367495   19.60 19.17 19.49   ~ 170 2
31 [VV96] J162304.5+662401 QSO 16 23 04.5224207042 +66 24 01.069583730   19.477   17.430   ~ 54 1
32 7C 1645+6335 QSO 16 45 58.5522590682 +63 30 10.901645746   19.87 19.77 19.5   ~ 45 1
33 6C 170404+604844 Sy1 17 04 41.3742389551 +60 44 30.522600868   15.65 15.40 15.30   ~ 717 1
34 ICRF J173549.0+504911 Bz? 17 35 49.00517 +50 49 11.5659       22.40   ~ 40 1
35 7C 175844.60+384828.00 QSO 18 00 24.76536125 +38 48 30.6975330   17.8 17.8 17.04   ~ 123 1
36 ICRF J181143.1+170457 BLL 18 11 43.18347313 +17 04 57.2573737       18.98   ~ 23 0
37 QSO J1840+3900 QSO 18 40 57.15423614 +39 00 45.7241751     19.20 19.14   ~ 44 1
38 QSO B1848+283 QSO 18 50 27.5896910962 +28 25 13.154274911   17.1 17 17.16   ~ 69 1
39 ICRF J185527.7+374256 QSO 18 55 27.70680460 +37 42 56.9665264       20.20   ~ 30 1
40 ICRF J192748.4+735801 Sy1 19 27 48.4944745594 +73 58 01.571908984     15.5 15.11   ~ 484 2
41 ICRF J202135.2+051504 QSO 20 21 35.28120311 +05 15 04.7785042       21.70   ~ 33 0
42 [VV96] J202456.5+171814 QSO 20 24 56.5633680729 +17 18 13.191922409   17.5 19.5 17.51   ~ 40 1
43 QSO B2059+034 QSO 21 01 38.83416420 +03 41 31.3209577   18.13 17.78 17.68   ~ 144 1
44 QSO J2123+0535 QSO 21 23 44.51738 +05 35 22.0933   18.3 17.5 19.86   ~ 257 1
45 ICRF J220330.9+100742 Bz? 22 03 30.95265516 +10 07 42.5859399       21.38   ~ 30 0
46 ICRF J220752.8+165217 QSO 22 07 52.86568240 +16 52 17.8155788   19.5 19.5 19.98   ~ 33 1
47 QSO B2209+236 QSO 22 12 05.96631138 +23 55 40.5438272   19   19.69   ~ 184 1
48 QSO J2257+0243 QSO 22 57 17.56309815 +02 43 17.5117291   18.04 17.96 18.45   ~ 142 1
49 QSO J2320+0513 QSO 23 20 44.85659790 +05 13 49.9525567   18.6 19.0     ~ 132 1
50 QSO B2327+335 QSO 23 30 13.7381083257 +33 48 36.469294461     18.5 18.71   ~ 37 1

    Equat.    Gal    SGal    Ecl

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2019.10.22-12:11:32

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