2011A&A...529A..16K

Query : 2011A&A...529A..16K

2011A&A...529A..16K - Astronomy and Astrophysics, volume 529A16-16 (2011/5-1)

γ-rays in flat-spectrum AGN: revisiting the fast jet hypothesis with the CJF sample.

KAROUZOS M., BRITZEN S., WITZEL A., ZENSUS J.A. and ECKART A.

Abstract (from CDS):

The recent release of the First Fermi-LAT Source Catalog solidified the predominant association of extragalactic γ-ray emitters to active galaxies, in particular blazars. A tight connection between AGN jet kinematics and γ-ray properties has been argued for, attributing the energetic emission from active galaxies to their highly relativistic outflows. We investigate the Caltech-Jodrell Bank flat-spectrum (CJF) sample to study the connection between AGN jet kinematics and their γ-ray properties. The high number of sources included in the sample, in addition to the excellent kinematic data available, allows us to investigate the origin of γ-ray emission in AGN. We identify the CJF sources detected in γ-rays (by Fermi-LAT and EGRET). We use γ-ray luminosities and the available VLBI kinematic data to look for correlations between γ-ray and kinematic properties, as well as for differences between AGN classes (quasars, BL Lacs, radio galaxies). We also check the kinematics of the TeV sources in the CJF. 21.8% of the CJF has been detected in the γ-ray regime. We find the detectability of BL Lacs significantly higher compared to quasars. Sources detected in the γ-rays show a wider apparent jet velocity distribution compared to the non-detected ones, but the maxima of both distributions are at similar values. No strong link between γ-ray detectability and fast apparent jet speeds is found. A tentative correlation is found between γ-ray luminosity and maximum apparent jet speeds, stronger for BL Lac and γ-variable sources. We find non-radial jet motions to be important to γ-ray emission. We suggest two-zone, spine-sheath models as a possible explanation for our results. Two out of four CJF TeV sources show superluminal jet speeds, in contrast to previous studies.

Abstract Copyright: ∼

Journal keyword(s): galaxies: statistics - galaxies: active - galaxies: nuclei - galaxies: jets - gamma rays: galaxies

Simbad objects: 72

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Number of rows : 72
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 QSO B0003+380 Bla 00 05 57.17538691 +38 20 15.1489639   19.4 18.10 17.16   ~ 155 1
2 6C 011029+493221 Bla 01 13 27.00680467 +49 48 24.0432101   18.4 18.4 17.80   ~ 130 1
3 6C 013354+473615 Bla 01 36 58.59480326 +47 51 29.1000720     19.50 19.25 15.21 ~ 537 1
4 6C 021252+733537 BLL 02 17 30.81335327 +73 49 32.6217355     19.00 18.97   ~ 485 1
5 6C 021803+354230 BLL 02 21 05.4920852208 +35 56 13.848581904   20.0 20.0 19.60   ~ 603 3
6 3C 66A BLL 02 22 39.6114771888 +43 02 07.799534304   15.71 15.21 14.5   ~ 942 2
7 7C 022737.60+401937.00 Bla 02 30 45.71078259 +40 32 53.0685846     19.00 18.51   ~ 99 1
8 [VV96] J031049.8+381453 BLL 03 10 49.87992240 +38 14 53.8378761     19.70 19.21   ~ 127 1
9 NGC 1275 Bla 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 4243 3
10 8C 0346+800 Bla 03 54 46.12599356 +80 09 28.8472674       19.5   ~ 81 1
11 3C 151 QSO 06 04 35.62879242 +44 13 58.5481902           ~ 53 1
12 ICRF J062518.2+444001 BLL 06 25 18.26537500 +44 40 01.6261460     16.80 18.71   ~ 112 1
13 8C 0633+734 Bla 06 39 21.9609776712 +73 24 58.043668788   16.0 17.3 18.22   ~ 124 1
14 6C 065044+451825 Bla 06 54 23.71365373 +45 14 23.5454988     21.00 19.76   ~ 157 1
15 B3 0700+470 Rad 07 04 09.55828126 +47 00 56.0399312           ~ 27 1
16 4C 47.23 BLL 07 10 46.10488160 +47 32 11.1426490   18.2 18.2 13.9   ~ 165 1
17 8C 0716+714 BLL 07 21 53.4482942664 +71 20 36.363846516   15.5 15.50 14.27   ~ 1388 1
18 QSO J0738+1742 BLL 07 38 07.39375312 +17 42 18.9981506   16.76 16.22 15.78   ~ 1045 1
19 4C 54.15 BLL 07 53 01.38457270 +53 52 59.6370830   18.5   16.77   ~ 173 1
20 6C 080047+615309 Bla 08 05 18.17956222 +61 44 23.7005580       19.64   ~ 154 1
21 7C 080458.39+495918.00 Bla 08 08 39.66628970 +49 50 36.5304041   19.55 19.18 18.34   ~ 389 2
22 7C 081451.89+423206.00 BLL 08 18 15.99961476 +42 22 45.4148987   18.88 18.18 17.81   ~ 429 1
23 4C 56.16A Bla 08 24 47.23636459 +55 52 42.6693589   18.52 18.19 17.82   ~ 216 1
24 4C 71.07 Bla 08 41 24.36528508 +70 53 42.1730435     17.30 16.8   ~ 818 1
25 6C 091740+445437 Bla 09 20 58.45848666 +44 41 53.9850947   18.40 18.16 16.55   ~ 407 1
26 6C 091739+622838 Bla 09 21 36.23107643 +62 15 52.1803510   19.76 19.26 18.96   ~ 394 1
27 6C 092554+502611 BLL 09 29 15.4401569832 +50 13 35.990913000   17.18 16.80 15.94   ~ 159 2
28 4C 55.17 Bla 09 57 38.1839604096 +55 22 57.754950636   18.24 17.89     ~ 459 1
29 6C 095456+654857 BLL 09 58 47.2451872176 +65 33 54.819354600     17.0 15.75   ~ 771 1
30 7C 1015+3557 Bla 10 18 10.98810472 +35 42 39.4409041   18.62 18.07 17.65   ~ 212 1
31 4C 40.25 Bla 10 23 11.56566843 +39 48 15.3853581   17.5 17.5 17.18   ~ 182 1
32 7C 1030+4131 Bla 10 33 03.70787172 +41 16 06.2329333   20.01 19.64 19.97   ~ 234 1
33 6C 103031+610629 Bla 10 33 51.4290959304 +60 51 07.334442756   19.31 18.86 20.24   ~ 195 2
34 6C 103912+811006 Bla 10 44 23.06257022 +80 54 39.4430485     16.5 18.29   ~ 234 1
35 6C 104451+715930 Bla 10 48 27.61992778 +71 43 35.9384142     19.0 17.49   ~ 270 1
36 Z 184-50 BLL 11 04 27.3140835504 +38 12 31.798495872   13.50 12.90 8.31   ~ 2841 1
37 CJ1 1144+402 Rad 11 47 +39.9     18.5     ~ 8 0
38 NGC 3894 Bla 11 48 50.35817663 +59 24 56.3822416   12.9   11.57   ~ 268 1
39 ICRF J120922.7+411941 BLL 12 09 22.7879963712 +41 19 41.371293540   18.42 17.83 16.74   ~ 133 2
40 8C 1221+809 BLL 12 23 40.49375661 +80 40 04.3404140     19.0 19.3   ~ 119 1
41 LB 2449 BLL 12 48 18.7847605224 +58 20 28.717260720   16.10 15.78 15.19   ~ 215 1
42 1RXS J125311.9+530105 BLL 12 53 11.9204702472 +53 01 11.737422696   18.07 17.51 16.4   ~ 143 1
43 5C 12.291 Bla 13 08 23.70913457 +35 46 37.1640036   20.95 20.22 19.43   ~ 110 1
44 NVSS J132145+831613 rG 13 21 45.60892145 +83 16 13.4236229           ~ 54 1
45 6C 135734+765743 Bla 13 57 55.37154275 +76 43 21.0509950     19.0 20.27   ~ 134 1
46 6C 141804+543700 BLL 14 19 46.5974051952 +54 23 14.787857796   16.17 15.65 14.16   ~ 630 1
47 6C 143208+421634 Bla 14 34 05.69449191 +42 03 15.9915904   20.07 19.66 20.39   ~ 99 1
48 6C 150412+374224 Bla 15 06 09.52997529 +37 30 51.1325012   21.2 21.2 20.60   ~ 213 1
49 6C 154338+514423 Bla 15 45 02.8236292176 +51 35 00.878127144   17.96 17.77 17.57   ~ 83 1
50 4C 38.41 Bla 16 35 15.49297809 +38 08 04.5005995   18.14 17.97 17.25   ~ 906 1
51 3C 345 Bla 16 42 58.80997043 +39 48 36.9939552   16.81 16.59 16.84   ~ 1808 3
52 Z 225-7 BLL 16 53 52.21668403 +39 45 36.6088754 14.09 14.15 13.29 8.26   ~ 2304 2
53 6C 170021+683437 Bla 17 00 09.29285259 +68 30 06.9591278     17.00 18.47   ~ 143 1
54 7C 172226.89+400715.00 BLL 17 24 05.42881867 +40 04 36.4570720   21.90   19.75   ~ 106 1
55 7C 172601.30+453309.00 BLL 17 27 27.65080202 +45 30 39.7312530   19.0 18.10 16.64   ~ 233 2
56 7C 173240.70+385949.00 BLL 17 34 20.57853650 +38 57 51.4430945   19.5 19 19.00   ~ 232 1
57 4C 51.37 Bla 17 40 36.97784792 +52 11 43.4073694   18.16 18.70 16.73   ~ 441 1
58 4C 62.29 QSO 17 46 14.03413499 +62 26 54.7383195   20.91 19.51     ~ 124 1
59 RX J1748.5+7005 BLL 17 48 32.8402992264 +70 05 50.768819304   17.46 17.01 15.48   ~ 456 2
60 ICRF J174900.3+432151 BLL 17 49 00.36038214 +43 21 51.2873300     18.21 19.84   ~ 106 1
61 7C 175154.00+441019.00 BLL 17 53 22.64788925 +44 09 45.6862067   19.5 19.5 18.76   ~ 84 1
62 1RXS J180043.6+782806 BLL 18 00 45.6838528560 +78 28 04.018028016   16.4 15.90 16.134   ~ 793 1
63 Z 340-35 BLL 18 06 50.6802916920 +69 49 28.109609256   14.77 14.22 11.39   ~ 909 1
64 4C 56.27 BLL 18 24 07.06837171 +56 51 01.4908155   18.9 19.30 16.48   ~ 510 1
65 6C 184914+670207 Bla 18 49 16.07228484 +67 05 41.6802599     16.90 17.45   ~ 305 2
66 QSO B1851+488 Bla 18 52 28.54781487 +48 55 47.4814782   19.0   18.77   ~ 121 1
67 8C 2007+777 BLL 20 05 30.9987913056 +77 52 43.248139536     16.5 17.36   ~ 474 1
68 4C 72.28 BLL 20 09 52.3047264984 +72 29 19.351077612   19.0   19.40   ~ 127 1
69 CJ2 2023+760 BLL 20 22 27.9 +76 11 23           ~ 10 0
70 NAME BL Lac BLL 22 02 43.2913536816 +42 16 39.979416792   15.66 14.72     ~ 2397 1
71 6C 234648+383225 Bla 23 49 20.82654326 +38 49 17.5585751   19.1       ~ 55 1
72 6C 235150+453621 Bla 23 54 21.68022501 +45 53 04.2365520   20.6 20.60 19.1   ~ 252 1

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