2018A&A...616A..63A


C.D.S. - SIMBAD4 rel 1.7 - 2019.09.23CEST12:26:55

2018A&A...616A..63A - Astronomy and Astrophysics, volume 616A, 63-63 (2018/8-1)

The γ-ray emitting region in low synchrotron peak blazars. Testing self-synchrotron Compton and external Compton scenarios.

ARSIOLI B. and CHANG Y.-L.

Abstract (from CDS):


Aims. From the early days in γ-ray astronomy, locating the origin of GeV emission within the core of an active galactic nucleus (AGN) persisted as an open question; the problem is to discern between near- and far-site scenarios with respect to the distance from the super massive central engine. We investigate this question under the light of a complete sample of low synchrotron peak (LSP) blazars which is fully characterized along many decades in the electromagnetic spectrum, from radio up to tens of GeV. We consider the high-energy emission from bright radio blazars and test for synchrotron self-Compton (SSC) and external Compton (EC) scenarios in the framework of localizing the γ-ray emission sites. Given that the inverse Compton (IC) process under the EC regime is driven by the abundance of external seed photons, these photons could be mainly ultraviolet (UV) to X-rays coming from the accretion disk region and the broad-line region (BLR), therefore close to the jet launch base; or infrared (IR) seed photons from the dust torus and molecular cloud spine-sheath, therefore far from jet launch base. We investigate both scenarios, and try to reveal the physics behind the production of γ-ray radiation in AGNs which is crucial in order to locate the production site.
Methods. Based on a complete sample of 104 radio-selected LSP blazars, with 37GHz flux density higher than 1Jy, we study broadband population properties associated with the nonthermal jet emission process, and test the capability of SSC and EC scenarios to explain the overall spectral energy distribution (SED) features. We use SEDs well characterized from radio to γ rays, considering all currently available data. The enhanced available information from recent works allows us to refine the study of Syn to IC peak correlations, which points to a particular γ-ray emission site.
Results. We show that SSC alone is not enough to account for the observed SEDs. Our analysis favors an EC scenario under the Thomson scattering regime, with a dominant IR external photon field. Therefore, the far-site (i.e., far from the jet launch) is probably the most reasonable scenario to account for the population properties of bright LSP blazars in cases modeled with a pure leptonic component. We calculate the photon energy density associated with the external field at the jet comoving frame to be U'ext=1.69x10–2erg/cm3, finding good agreement to other correlated works.

Abstract Copyright: © ESO 2018

Journal keyword(s): galaxies: active - gamma rays: galaxies - radiation mechanisms: non-thermal

Simbad objects: 104

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Number of rows : 104

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 QSO B0003-066 BLL 00 06 13.89288849 -06 23 35.3353162   19.1   17.14   ~ 246 1
2 Mrk 1501 Sy1 00 10 31.0058529490 +10 58 29.505989476   15.96 15.40 12.22   ~ 622 0
3 QSO B0048-09 BLL 00 50 41.31738756 -09 29 05.2102688 16.74 16.39 16.22 16.14   ~ 412 2
4 7C 0059+5808 QSO 01 02 45.76238248 +58 24 11.1366009   20.09 19.22 18.57 17.90 ~ 179 1
5 4C 01.02 QSO 01 08 38.7712667820 +01 35 00.318317679   18.54 18.39 19.05   ~ 457 1
6 QSO J0125-0005 QSO 01 25 28.8436590768 -00 05 55.930666802   16.92 16.64 16.30   ~ 248 1
7 QSO B0133+476 QSO 01 36 58.59480585 +47 51 29.1000445     18.0 19.25 15.21 ~ 436 1
8 QSO B0149+218 QSO 01 52 18.05904586 +22 07 07.6998109     18 18.89   ~ 131 1
9 4C 15.05 Bla 02 04 50.41389571 +15 14 11.0436591   21.9 22.1 21.00   ~ 356 1
10 6C 021252+733537 BLL 02 17 30.8143057005 +73 49 32.612359669     19.0 18.97   ~ 400 1
11 6C 022440+670742 QSO 02 28 50.05148948 +67 21 03.0293039   19.5   18.1   ~ 224 1
12 4C 28.07 QSO 02 37 52.40567732 +28 48 08.9900231     18.5 16.99   ~ 486 1
13 QSO B0235+1624 BLL 02 38 38.93010 +16 36 59.2746   16.46 15.50 15.92   ~ 1362 2
14 NGC 1052 GiP 02 41 04.79851 -08 15 20.7517 11.84 11.41 10.47 10.71   ~ 1093 2
15 QSO B0306+101 QSO 03 09 03.62350016 +10 29 16.3409599   18.45   19.91   ~ 153 1
16 3C 84 Sy2 03 19 48.1597607660 +41 30 42.114155434   13.10 12.48 11.09   ~ 3452 3
17 4C 32.14 QSO 03 36 30.10760600 +32 18 29.3422210     17.50 16.6   ~ 568 1
18 QSO B0336-0156 QSO 03 39 30.93778751 -01 46 35.8041062   18.96 18.41 17.33   ~ 499 1
19 4C 50.11 QSO 03 59 29.74726473 +50 57 50.1615765           ~ 388 1
20 3C 111 Sy1 04 18 21.2773655604 +38 01 35.801523843   19.75 18.05     ~ 838 1
21 QSO B0420-0127 QSO 04 23 15.80072776 -01 20 33.0654034   17.50 17.00 16.28   ~ 1015 2
22 Mrk 1506 Sy1 04 33 11.0958197353 +05 21 15.617543663   15.72 15.05 10.08   ~ 1800 2
23 QSO B0446+113 BLL 04 49 07.67110088 +11 21 28.5964577     20 18.58   ~ 216 1
24 4C -02.19 QSO 05 01 12.80988366 -01 59 14.2562534   19.1 18.4 19.04   ~ 505 1
25 QSO B0507+179 QSO 05 10 02.36912982 +18 00 41.5816534   20.0 19.0 19.09   ~ 274 1
26 QSO J0530+13 QSO 05 30 56.41672 +13 31 55.1495     20.0 19.35   ~ 870 1
27 7C 055201.39+394824.00 QSO 05 55 30.80561150 +39 48 49.1649664     18.0 17.5   ~ 458 2
28 QSO B0605-0834 QSO 06 07 59.69923743 -08 34 49.9781718     18.5 17.70   ~ 381 1
29 7C 064253.00+445430.00 QSO 06 46 32.02599463 +44 51 16.5901237   19.57 18.49 18.64   ~ 314 1
30 8C 0716+714 BLL 07 21 53.4484901266 +71 20 36.362058601   15.5 14.17 14.27   ~ 1097 1
31 QSO B0723-007 BLL 07 25 50.63996171 -00 54 56.5441985   17.39 16.57 15.82   ~ 209 1
32 QSO J0738+1742 BLL 07 38 07.39374766 +17 42 18.9982302   16.76 16.22 15.78   ~ 887 1
33 QSO B0736+01 QSO 07 39 18.03389693 +01 37 04.6178588   16.90 16.47 16.19   ~ 613 1
34 QSO B0748+126 QSO 07 50 52.04573519 +12 31 04.8281766   17.67 17.28 17.16   ~ 265 1
35 QSO B0754+10 BLL 07 57 06.64294682 +09 56 34.8523471   15.43 15.00 15.99   ~ 395 1
36 QSO B0805-077 QSO 08 08 15.53603615 -07 51 09.8862880     19.5 16.71   ~ 207 1
37 7C 080458.39+495918.00 QSO 08 08 39.66628353 +49 50 36.5304035   19.55 19.18 18.34   ~ 316 2
38 QSO B0823+033 BLL 08 25 50.33835429 +03 09 24.5200730   17.81 17.23 16.91   ~ 286 1
39 7C 082754.29+242103.00 QSO 08 30 52.08619070 +24 10 59.8204032   17.62 17.26 16.30   ~ 452 1
40 7C 083620.60+710405.00 QSO 08 41 24.36526906 +70 53 42.1730054     16.5 16.8   ~ 679 1
41 QSO J0854+2006 BLL 08 54 48.8749311881 +20 06 30.642936668   15.91 15.43 15.56   ~ 1937 1
42 ICRF J090933.4+425346 Sy2 09 09 33.49711097 +42 53 46.4818256   19.98 19.42 18.220   ~ 455 0
43 6C 091740+445437 QSO 09 20 58.45848243 +44 41 53.9850927   18.40 18.16 16.55   ~ 310 1
44 ICRF J092703.0+390220 Sy1 09 27 03.0139516273 +39 02 20.847968628   17.17 17.00 16.486   ~ 920 1
45 4C 40.24 QSO 09 48 55.33815234 +40 39 44.5869810   18.31 18.02 17.85   ~ 298 1
46 ICRF J095649.8+251516 Sy1 09 56 49.87539 +25 15 16.0505   17.46 17.21 17.96   ~ 279 1
47 6C 095456+654857 BLL 09 58 47.2452838930 +65 33 54.821524491     17.0 15.75   ~ 604 1
48 QSO B1036+054 QSO 10 38 46.77987569 +05 12 29.0867545   20.21 19.45 19.53   ~ 81 1
49 ICRF J104309.0+240835 BLL 10 43 09.03576998 +24 08 35.4093695   17.98 17.32 16.40   ~ 89 1
50 4C 01.28 BLL 10 58 29.60520747 +01 33 58.8237691   18.74 18.28 16.68   ~ 613 2
51 QSO B1128+385 QSO 11 30 53.28261193 +38 15 18.5469933   19.11 18.80 19.42   ~ 165 1
52 6C 115021+811507 QSO 11 53 12.49919940 +80 58 29.1545750     18.5 18.54   ~ 215 1
53 LB 2136 QSO 11 53 24.46663282 +49 31 08.8301947   17.94 17.66     ~ 409 1
54 Ton 599 QSO 11 59 31.83390975 +29 14 43.8268741   14.80 14.41 17.652 13.39 ~ 779 1
55 4C 04.42 QSO 12 22 22.54962080 +04 13 15.7761797   17.88 17.98 17.06   ~ 236 1
56 4C 21.35 QSO 12 24 54.4583467193 +21 22 46.385219365   17.56 17.50 18.2   ~ 544 2
57 3C 273 BLL 12 29 06.6996828061 +02 03 08.598846466   13.05 14.830 14.11   ~ 5234 1
58 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6004 3
59 3C 279 QSO 12 56 11.1664521013 -05 47 21.531840471   18.01 17.75 15.87   ~ 2628 2
60 7C 1308+3236 BLL 13 10 28.66387 +32 20 43.7831   15.61 15.24 17.91   ~ 735 1
61 QSO B1324+224 QSO 13 27 00.86131377 +22 10 50.1629729     18.90 18.80   ~ 120 1
62 QSO B1413+135 BLL 14 15 58.81750938 +13 20 23.7129069   21.055 20.000 18.461   ~ 367 1
63 6C 141804+543700 BLL 14 19 46.5976435439 +54 23 14.787308481   16.17 15.65 14.16   ~ 528 1
64 QSO B1502+1041 QSO 15 04 24.97978142 +10 29 39.1986151   18.97 18.56 18.94   ~ 433 1
65 QSO J1512-0906 QSO 15 12 50.53292491 -09 05 59.8295878   16.74 16.54     ~ 1117 1
66 QSO B1546+0246 QSO 15 49 29.43684301 +02 37 01.1634197   17.57 17.42 15.53   ~ 305 1
67 4C 05.64 QSO 15 50 35.26924162 +05 27 10.4484262   19.10 18.73 19.02   ~ 273 1
68 4C 10.45 QSO 16 08 46.2031492699 +10 29 07.777566795   18.5 18.0 18.03   ~ 332 1
69 6C 161147+342017 QSO 16 13 41.0645258703 +34 12 47.911898732   17.98 17.46 17.07   ~ 574 1
70 4C 38.41 QSO 16 35 15.4926950870 +38 08 04.498949104   18.14 17.97 17.25   ~ 729 1
71 6C 163852+395305 QSO 16 40 29.6340195596 +39 46 46.038182821   18.4 16.5 18.75   ~ 263 2
72 6C 164218+690201 QSO 16 42 07.84850549 +68 56 39.7564973   19.723   19.219   ~ 278 1
73 3C 345 QSO 16 42 58.8100340220 +39 48 36.999540578   16.81 16.59 16.84   ~ 1529 2
74 4C 39.49 BLL 16 53 52.21668494 +39 45 36.6089458 14.09 14.15 13.29 8.26   ~ 1870 2
75 4C 51.37 QSO 17 40 36.9779934388 +52 11 43.411910710   18.16 18.5 16.73   ~ 355 1
76 QSO B1741-038 QSO 17 43 58.85613396 -03 50 04.6166450     18.5 17.98   ~ 464 1
77 4C 09.57 BLL 17 51 32.81857318 +09 39 00.7284829   17.46 16.78 15.57   ~ 774 1
78 8C 1803+784 BLL 18 00 45.6831135718 +78 28 04.017792333   16.4 16.4 15.46   ~ 651 1
79 3C 371 BLL 18 06 50.6803567107 +69 49 28.108152993   14.77 14.22 11.39   ~ 786 2
80 4C 56.27 BLL 18 24 07.06837771 +56 51 01.4908371   18.9 18.4 16.48   ~ 430 1
81 ICRF J182931.7+484446 Sy1 18 29 31.7812801678 +48 44 46.158815781   17.05 16.81 16.860   ~ 619 1
82 ICRF J184916.0+670541 Sy1 18 49 16.07228978 +67 05 41.6802978     20 17.45   ~ 208 1
83 ICRF J192748.4+735801 Sy1 19 27 48.4944745594 +73 58 01.571908984     15.5 15.11   ~ 483 2
84 QSO B1954+513 QSO 19 55 42.73826837 +51 31 48.5461210     18.5 17.34   ~ 208 1
85 8C 2007+777 BLL 20 05 30.9981060951 +77 52 43.245329882     16.5 17.36   ~ 395 1
86 QSO B2005+40 QSO 20 07 44.9443187008 +40 29 48.601470737   18.5 19 20.3   ~ 259 1
87 ICRF J202206.6+613658 Sy2 20 22 06.68174818 +61 36 58.8047862     19.5 17.58   ~ 284 1
88 3C 418.0 QSO 20 38 37.03473972 +51 19 12.6625810   21.30 20.00 18.9   ~ 261 0
89 QSO J2123+0535 QSO 21 23 44.51738 +05 35 22.0933   18.3 17.5 19.86   ~ 257 1
90 4C -02.81 BLL 21 34 10.30959643 -01 53 17.2387909   18.6 19.0 18.87   ~ 320 1
91 QSO B2134+0028 QSO 21 36 38.5862648232 +00 41 54.210724774   17.30 17.08 17.02   ~ 514 2
92 QSO B2136+1410 QSO 21 39 01.30926937 +14 23 35.9922096     18.5 18.22   ~ 222 1
93 4C 06.69 QSO 21 48 05.4585565234 +06 57 38.605396596   16.85 16.47 15.06   ~ 581 1
94 NAME BL Lac BLL 22 02 43.2913773726 +42 16 39.978417860   15.66 14.72     ~ 1973 1
95 4C 31.63 BLL 22 03 14.9758020 +31 45 38.269707   15.85 15.58 14.33   ~ 453 1
96 QSO B2201+1711 BLL 22 03 26.89368 +17 25 48.2479       14.76   ~ 166 1
97 4C -03.79 QSO 22 18 52.03772395 -03 35 36.8794566   16.93 16.38 16.15   ~ 308 1
98 3C 446 BLL 22 25 47.25929302 -04 57 01.3907581   18.83 18.39 16.3   ~ 752 1
99 QSO B2227-0848 QSO 22 29 40.08434003 -08 32 54.4353948   17.80 17.41 17.81   ~ 284 1
100 4C 11.69 QSO 22 32 36.40890517 +11 43 50.9040717   17.75 17.33     ~ 919 2
101 QSO B2232+282 BLL 22 36 22.4706694778 +28 28 57.412050821   19.1 19.0 17.60   ~ 215 1
102 3C 454.3 QSO 22 53 57.74798 +16 08 53.5611   16.57 16.10 15.22   ~ 2435 2
103 4C 45.51 QSO 23 54 21.68022839 +45 53 04.2365363   20.6 20.6 19.1   ~ 193 1
104 6C 235401+813601 QSO 23 56 22.793854 +81 52 52.25516     20.3 18   ~ 54 1

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2019.09.23-12:26:55

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