2006A&A...450..959O


Query : 2006A&A...450..959O

2006A&A...450..959O - Astronomy and Astrophysics, volume 450, 959-970 (2006/5-2)

VLBA images of high frequency peakers.

ORIENTI M., DALLACASA D., TINTI S. and STANGHELLINI C.

Abstract (from CDS):

We propose a morphological classification based on the parsec scale structure of fifty-one High Frequency Peakers (HFPs) from the ``bright'' HFP sample. VLBA images at two adjacent frequencies (chosen among 8.4, 15.3, 22.2 and 43.2GHz) have been used to investigate the morphological properties of the HFPs in the optically thin part of their spectrum. We confirm that there is quite a clear distinction between the pc-scale radio structure of galaxies and quasars: the 78% of the galaxies show a ``Double/Triple'' morphology, typical of Compact Symmetric Objects (CSOs), while the 87% of the quasars are characterised by Core-Jet or unresolved structure. This suggests that most HFP candidates identified with quasars are likely blazar objects in which a flaring self-absorbed component at the jet base was outshining the remainder of the source at the time of the selection based on the spectral shape. Among the sources classified as CSOs or candidates it is possible to find extremely young radio sources with ages of about 100 years or even less.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: nuclei - radio continuum: galaxies - galaxies: quasar: general

VizieR on-line data: <Available at CDS (J/A+A/450/959): table2.dat table3.dat table4.dat>

Simbad objects: 58

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Number of rows : 58
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 QSO J0217+0144 QSO 02 17 48.9544520496 +01 44 49.693296336   16.74 16.09 18.51 13.29 ~ 397 1
7 ICRF J032915.3+351005 BLL 03 29 15.3548503584 +35 10 05.989666620       17.60   ~ 39 1
8 QSO J0357+2319 QSO 03 57 21.6099522120 +23 19 53.824638900       18.78   ~ 38 1
9 ICRF J042805.8+325952 QSO 04 28 05.8087390 +32 59 52.043968       21.39   ~ 42 0
10 PMN J0519+0848 Rad 05 19 10.8111308 +08 48 56.734522           ~ 20 1
11 ICRF J062518.2+444001 BLL 06 25 18.2653266264 +44 40 01.624515204     16.80 18.71   ~ 83 1
12 6C 063338+593631 Bz? 06 38 02.8719115 +59 33 22.213886           ~ 34 1
13 QSO B0636+68 BLL 06 42 04.2572705040 +67 58 35.620484340     16.46 16.01   ~ 215 1
14 7C 064253.00+445430.00 QSO 06 46 32.0253442416 +44 51 16.588600488   19.57 18.49 18.64   ~ 335 1
15 QSO B0646+600 QSO 06 50 31.2532631952 +60 01 44.543070624   18.9 18.6 19.65   ~ 111 1
16 ICRF J065510.0+410010 QSO 06 55 10.0242416016 +41 00 10.168189344   14.6   9.37   ~ 61 1
17 [VV98] J072201.2+372229 QSO 07 22 01.2594530208 +37 22 28.634815884     17.91 17.27   ~ 34 1
18 ICRF J092703.0+390220 Sy1 09 27 03.0138528936 +39 02 20.850343332   17.17 17.00 16.486   ~ 964 1
19 QSO J1016+0513 QSO 10 16 03.13646769 +05 13 02.3414482   20.26 19.83 20   ~ 124 1
20 QSO B1043+066A QSO 10 45 52.7330168808 +06 24 36.451178352   18.24 17.92 17.53   ~ 61 1
21 [VV96] J114856.6+525426 QSO 11 48 56.5690073664 +52 54 25.323857892   17.19 16.87 16.45   ~ 74 1
22 QSO B1333+459 QSO 13 35 21.9623576640 +45 42 38.232772128   18.30 18.22 17.67   ~ 95 0
23 4C 58.26 Bz? 13 35 25.9285191 +58 44 00.291595       21.91   ~ 50 1
24 QSO B1404+286 BLL 14 07 00.3941769384 +28 27 14.692128372   16.13 15.35 10.29   ~ 729 2
25 ICRF J141236.3+133438 Bz? 14 12 36.3726447 +13 34 38.152733           ~ 25 0
26 QSO B1422+2309 BLL 14 24 38.09400 +22 56 00.5900   16.77 15.84 14.79   ~ 436 1
27 [PBW92] 1422+231 gLS 14 24 38.09400 +22 56 00.5900   16.77 15.84 14.79   ~ 356 0
28 QSO J1430+1043 QSO 14 30 09.7389618072 +10 43 26.857127172     18.5 18.67   ~ 85 1
29 ICRF J145738.1+074954 QSO 14 57 38.1294678144 +07 49 54.696380520   21.26 20.74 19.37   ~ 36 1
30 ICRF J150506.4+032630 Sy1 15 05 06.4772159496 +03 26 30.819339636   19.02 18.62 17.72   ~ 222 1
31 ICRF J151141.2+051809 Sy1 15 11 41.2665365784 +05 18 09.243401724   18.49 17.80 13.95   ~ 98 0
32 QSO J1526+6650 QSO 15 26 42.8744737248 +66 50 54.644414316   18.26 17.87 17.24   ~ 50 0
33 ICRF J160341.9+110548 BLL 16 03 41.9312847576 +11 05 48.680171916   18.41 17.82 16.66   ~ 44 1
34 QSO B1614+051 QSO 16 16 37.5569529792 +04 59 32.744135148   19.60 19.17 19.49   ~ 180 2
35 [VV96] J162304.5+662401 QSO 16 23 04.5201307656 +66 24 01.069442928   19.477   17.430   ~ 58 1
36 3C 345 QSO 16 42 58.8102993888 +39 48 37.002763188   16.81 16.59 16.84   ~ 1637 2
37 7C 1645+6335 QSO 16 45 58.5526926216 +63 30 10.922944752   19.87 19.77 19.5   ~ 55 1
38 ICRF J171701.1+191740 QSO 17 17 01.1657401320 +19 17 40.653622068           ~ 17 0
39 ICRF J173549.0+504911 Bz? 17 35 49.00517 +50 49 11.5659       22.40   ~ 45 1
40 4C 09.57 BLL 17 51 32.8186120872 +09 39 00.728629416   17.46 16.78 15.57   ~ 886 1
41 7C 175844.60+384828.00 QSO 18 00 24.7653461736 +38 48 30.697069572   17.8 17.8 17.04   ~ 139 1
42 ICRF J181143.1+170457 BLL 18 11 43.1835584352 +17 04 57.257698980       18.98   ~ 28 0
43 QSO J1840+3900 QSO 18 40 57.1546417320 +39 00 45.742293036     19.20 19.14   ~ 48 1
44 QSO B1848+283 QSO 18 50 27.5898721080 +28 25 13.155071160   17.1 17 17.16   ~ 77 1
45 ICRF J185527.7+374256 QSO 18 55 27.7068244 +37 42 56.965928       20.20   ~ 33 1
46 ICRF J202135.2+051504 QSO 20 21 35.2812075 +05 15 04.778183       21.70   ~ 36 0
47 [VV96] J202456.5+171814 QSO 20 24 56.5636552128 +17 18 13.196337192   17.5 19.5 17.51   ~ 45 1
48 QSO B2059+034 QSO 21 01 38.8344870144 +03 41 31.320939192   18.13 17.78 17.68   ~ 157 1
49 ICRF J211458.3+283257 QSO 21 14 58.3338141912 +28 32 57.198512652   18.6   18.91   ~ 37 1
50 QSO J2123+0535 QSO 21 23 44.5173734952 +05 35 22.093702692   18.3 17.5 19.86   ~ 271 1
51 QSO B2134+0028 QSO 21 36 38.5863558336 +00 41 54.211758468   17.30 17.08 17.02   ~ 545 2
52 ICRF J220330.9+100742 Bz? 22 03 30.9525909 +10 07 42.586730       21.38   ~ 36 0
53 ICRF J220752.8+165217 QSO 22 07 52.8660259608 +16 52 17.803405956   19.5 19.5 19.98   ~ 40 1
54 BWE 2209+2340 QSO 22 12 05.9664991416 +23 55 40.543886604   19   19.69   ~ 204 1
55 3C 454.3 Bla 22 53 57.7480438728 +16 08 53.561508864   16.57 16.10 15.22   ~ 2697 2
56 BWE 2254+0227 QSO 22 57 17.5630172064 +02 43 17.509646100   18.04 17.96 18.45   ~ 150 1
57 BWE 2318+0457 QSO 23 20 44.8566627408 +05 13 49.950278148   18.6 19.0     ~ 144 1
58 QSO B2327+335 QSO 23 30 13.7378153880 +33 48 36.469525752     18.5 18.71   ~ 44 1

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2022.09.24-18:44:04

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