2009A&A...494..527H


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.24CET19:30:25

2009A&A...494..527H - Astronomy and Astrophysics, volume 494, 527-537 (2009/2-1)

Doppler factors, Lorentz factors and viewing angles for quasars, BL Lacertae objects and radio galaxies.

HOVATTA T., VALTAOJA E., TORNIKOSKI M. and LAEHTEENMAEKI A.

Abstract (from CDS):

We have calculated variability Doppler boosting factors, Lorentz factors, and viewing angles for a large sample of sources by using total flux density observations at 22 and 37GHz and VLBI data. We decomposed the flux curves into exponential flares and determined the variability brightness temperatures of the fastest flares. By assuming the same intrinsic brightness temperature for each source, we calculated the Doppler boosting factors for 87 sources. In addition we used new apparent jet speed data to calculate the Lorentz factors and viewing angles for 67 sources. We find that all quasars in our sample are Doppler-boosted and that the Doppler boosting factors of BL Lacertae objects are lower than of quasars. The new Lorentz factors are about twice as high as in earlier studies, which is mainly due to higher apparent speeds in our analyses. The jets of BL Lacertae objects are slower than of quasars. There are some extreme sources with very high derived Lorentz factors of the order of a hundred. These high Lorentz factors could be real. It is also possible that the sources exhibit such rapid flares that the fast variations have remained undetected in monitoring programmes, or else the sources have a complicated jet structure that is not amenable to our simple analysis. Almost all the sources are seen in a small viewing angle of less than 20 degrees. Our results follow the predictions of basic unification schemes for AGN.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: jets - radio continuum: galaxies - radiation mechanisms: non-thermal - galaxies: quasars: general

Errata: erratum vol. 498, p. 723 (2009)

Simbad objects: 87

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Number of rows : 87

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 QSO B0003-066 BLL 00 06 13.89288849 -06 23 35.3353162   19.1   17.14   ~ 272 1
2 Mrk 1501 Sy1 00 10 31.0058529490 +10 58 29.505989476   15.96 15.40 12.22   ~ 656 0
3 QSO B0016+73 QSO 00 19 45.7863740 +73 27 30.017554     19.0 18.26   ~ 277 1
4 QSO B0048-09 BLL 00 50 41.31738756 -09 29 05.2102688 16.74 16.39 16.22 16.14   ~ 427 2
5 ICRF J005952.2+581223 QSO 00 59 52.2083579204 +58 12 23.682108462           ~ 19 1
6 4C 01.02 QSO 01 08 38.7712667820 +01 35 00.318317679   18.54 18.39 19.05   ~ 475 1
7 QSO B0133+476 Bla 01 36 58.59480585 +47 51 29.1000445     18.0 19.25 15.21 ~ 455 1
8 QSO B0149+218 QSO 01 52 18.05904586 +22 07 07.6998109     18 18.89   ~ 144 1
9 4C 15.05 Bla 02 04 50.41389571 +15 14 11.0436591   21.9 22.1 21.00   ~ 367 1
10 6C 021252+733537 BLL 02 17 30.8143057005 +73 49 32.612359669     19.0 18.97   ~ 415 1
11 3C 66A BLL 02 22 39.6111630878 +43 02 07.797284539   15.71 15.21 14.5   ~ 807 1
12 4C 67.05 QSO 02 28 50.05148948 +67 21 03.0293039   19.5   18.1   ~ 237 1
13 4C 28.07 QSO 02 37 52.40567732 +28 48 08.9900231     18.5 16.99   ~ 517 1
14 QSO B0235+1624 BLL 02 38 38.93010 +16 36 59.2746   16.46 15.50 15.92   ~ 1412 2
15 QSO B0306+101 QSO 03 09 03.62350016 +10 29 16.3409599   18.45   19.91   ~ 169 1
16 3C 84 Sy2 03 19 48.1597607660 +41 30 42.114155434   13.10 12.48 11.09   ~ 3616 3
17 4C 32.14 QSO 03 36 30.10760600 +32 18 29.3422210     17.50 16.6   ~ 591 1
18 QSO B0336-0156 QSO 03 39 30.93778751 -01 46 35.8041062   18.96 18.41 17.33   ~ 516 1
19 4C 50.11 QSO 03 59 29.74726473 +50 57 50.1615765           ~ 401 1
20 3C 111 Sy1 04 18 21.2773655604 +38 01 35.801523843   19.75 18.05     ~ 870 1
21 QSO B0420-0127 QSO 04 23 15.80072776 -01 20 33.0654034   17.50 17.00 16.28   ~ 1084 3
22 Mrk 1506 Sy1 04 33 11.0958197353 +05 21 15.617543663   15.72 15.05 10.08   ~ 1871 2
23 QSO B0440-003 QSO 04 42 38.66073910 -00 17 43.4203921   19.59 19.22 17.85   ~ 366 1
24 4C -02.19 QSO 05 01 12.80988366 -01 59 14.2562534   19.1 18.4 19.04   ~ 532 1
25 QSO J0530+13 Bla 05 30 56.41672 +13 31 55.1495     20.0 19.35   ~ 892 1
26 7C 055201.39+394824.00 QSO 05 55 30.80561150 +39 48 49.1649664     18.0 17.5   ~ 473 2
27 QSO B0605-0834 BLL 06 07 59.69923743 -08 34 49.9781718     18.5 17.70   ~ 407 1
28 7C 064253.00+445430.00 QSO 06 46 32.02599463 +44 51 16.5901237   19.57 18.49 18.64   ~ 326 1
29 8C 0716+714 BLL 07 21 53.4484901266 +71 20 36.362058601   15.5 14.17 14.27   ~ 1154 1
30 QSO J0738+1742 BLL 07 38 07.39374766 +17 42 18.9982302   16.76 16.22 15.78   ~ 905 1
31 QSO B0736+01 QSO 07 39 18.03389693 +01 37 04.6178588   16.90 16.47 16.19   ~ 637 1
32 QSO B0754+10 BLL 07 57 06.64294682 +09 56 34.8523471   15.43 15.00 15.99   ~ 411 1
33 7C 080458.39+495918.00 QSO 08 08 39.66628353 +49 50 36.5304035   19.55 19.18 18.34   ~ 330 2
34 7C 081451.89+423206.00 BLL 08 18 15.99960470 +42 22 45.4149140   18.88 18.18 17.81   ~ 360 1
35 7C 082754.29+242103.00 QSO 08 30 52.08619070 +24 10 59.8204032   17.62 17.26 16.30   ~ 475 1
36 4C 71.07 QSO 08 41 24.36526906 +70 53 42.1730054     16.5 16.8   ~ 709 1
37 [VV98] J085009.6-121334 QSO 08 50 09.6356420 -12 13 35.376331     16.80 16.02   ~ 113 0
38 QSO J0854+2006 BLL 08 54 48.8749311881 +20 06 30.642936668   15.91 15.43 15.56   ~ 2060 1
39 ICRF J092703.0+390220 Sy1 09 27 03.0139516273 +39 02 20.847968628   17.17 17.00 16.486   ~ 937 1
40 4C 40.24 QSO 09 48 55.33815234 +40 39 44.5869810   18.31 18.02 17.85   ~ 313 1
41 ICRF J095649.8+251516 Sy1 09 56 49.87539 +25 15 16.0505   17.46 17.21 17.96   ~ 290 1
42 6C 095456+654857 BLL 09 58 47.2452838930 +65 33 54.821524491     17.0 15.75   ~ 629 1
43 4C 01.28 BLL 10 58 29.60520747 +01 33 58.8237691   18.74 18.28 16.68   ~ 666 2
44 Ton 599 QSO 11 59 31.83390975 +29 14 43.8268741   14.80 14.41 17.652 13.39 ~ 812 1
45 7C 1219+2830 BLL 12 21 31.6902446544 +28 13 58.500383827   16.81 16.11 14.24   ~ 793 1
46 4C 21.35 QSO 12 24 54.4583467193 +21 22 46.385219365   17.56 17.50 18.2   ~ 582 2
47 3C 273 BLL 12 29 06.6996828061 +02 03 08.598846466   13.05 14.830 14.11   ~ 5404 1
48 3C 279 Bla 12 56 11.1664521013 -05 47 21.531840471   18.01 17.75 15.87   ~ 2751 2
49 7C 1308+3236 BLL 13 10 28.66387 +32 20 43.7831   15.61 15.24 17.91   ~ 760 1
50 QSO B1324+224 QSO 13 27 00.86131377 +22 10 50.1629729     18.90 18.80   ~ 135 1
51 QSO B1413+135 BLL 14 15 58.81750938 +13 20 23.7129069   21.055 20.000 18.461   ~ 388 1
52 6C 141804+543700 BLL 14 19 46.5976435439 +54 23 14.787308481   16.17 15.65 14.16   ~ 546 1
53 QSO B1502+1041 Bla 15 04 24.97978142 +10 29 39.1986151   18.97 18.56 18.94   ~ 482 1
54 QSO J1512-0906 Bla 15 12 50.53292491 -09 05 59.8295878   16.74 16.54     ~ 1180 1
55 4C 14.60 BLL 15 40 49.49151734 +14 47 45.8848470   17.72 17.30 17.240   ~ 387 1
56 4C 10.45 QSO 16 08 46.203185540 +10 29 07.77583000   18.5 18.0 18.03   ~ 346 1
57 6C 161147+342017 QSO 16 13 41.0645258703 +34 12 47.911898732   17.98 17.46 17.07   ~ 585 1
58 4C 38.41 QSO 16 35 15.492970280 +38 08 04.50062279   18.14 17.97 17.25   ~ 765 1
59 ICRF J163813.4+572023 Sy1 16 38 13.45629705 +57 20 23.9790727     17.0 16.94   ~ 320 1
60 3C 345 QSO 16 42 58.8100340220 +39 48 36.999540578   16.81 16.59 16.84   ~ 1574 2
61 ICRF J172824.9+042704 Sy1 17 28 24.95272422 +04 27 04.9139217   17.43 16.99 16.24   ~ 202 1
62 QSO B1730-130 QSO 17 33 02.70578476 -13 04 49.5481484   18 18.5 18.78 17.39 ~ 1005 1
63 4C 51.37 Bla 17 40 36.9779934388 +52 11 43.411910710   18.16 18.5 16.73   ~ 369 1
64 QSO B1741-038 QSO 17 43 58.85613396 -03 50 04.6166450     18.5 17.98   ~ 486 1
65 4C 09.57 BLL 17 51 32.81857318 +09 39 00.7284829   17.46 16.78 15.57   ~ 832 1
66 8C 1803+784 BLL 18 00 45.6831135718 +78 28 04.017792333   16.4 16.4 15.46   ~ 675 1
67 3C 371 BLL 18 06 50.6803567107 +69 49 28.108152993   14.77 14.22 11.39   ~ 806 2
68 4C 56.27 BLL 18 24 07.06837771 +56 51 01.4908371   18.9 18.4 16.48   ~ 447 1
69 ICRF J182931.7+484446 Sy1 18 29 31.7812801678 +48 44 46.158815781   17.05 16.81 16.860   ~ 641 1
70 4C 73.18 BLL 19 27 48.4944745594 +73 58 01.571908984     15.5 15.11   ~ 498 2
71 QSO B1954+513 QSO 19 55 42.73826837 +51 31 48.5461210     18.5 17.34   ~ 221 1
72 8C 2007+777 BLL 20 05 30.9981060951 +77 52 43.245329882     16.5 17.36   ~ 412 1
73 QSO B2005+40 QSO 20 07 44.9443187008 +40 29 48.601470737   18.5 19 20.3   ~ 275 1
74 ICRF J202206.6+613658 Sy2 20 22 06.68174818 +61 36 58.8047862     19.5 17.58   ~ 304 1
75 [VV96] J202456.5+171814 QSO 20 24 56.5633680729 +17 18 13.191922409   17.5 19.5 17.51   ~ 45 1
76 QSO J2123+0535 QSO 21 23 44.51738 +05 35 22.0933   18.3 17.5 19.86   ~ 267 1
77 QSO B2134+0028 QSO 21 36 38.5862648232 +00 41 54.210724774   17.30 17.08 17.02   ~ 531 2
78 QSO B2136+1410 QSO 21 39 01.30926937 +14 23 35.9922096     18.5 18.22   ~ 236 1
79 4C 06.69 QSO 21 48 05.4585565234 +06 57 38.605396596   16.85 16.47 15.06   ~ 607 1
80 NAME BL Lac BLL 22 02 43.2913773726 +42 16 39.978417860   15.66 14.72     ~ 2036 1
81 4C 31.63 BLL 22 03 14.9758020 +31 45 38.269707   15.85 15.58 14.33   ~ 466 1
82 3C 446 BLL 22 25 47.2593030 -04 57 01.390762   18.83 18.39 16.3   ~ 775 1
83 QSO B2227-0848 QSO 22 29 40.08434003 -08 32 54.4353948   17.80 17.41 17.81   ~ 307 1
84 4C 11.69 QSO 22 32 36.40890517 +11 43 50.9040717   17.75 17.33     ~ 1001 2
85 QSO B2232+282 BLL 22 36 22.4706694778 +28 28 57.412050821   19.1 19.0 17.60   ~ 227 1
86 3C 454.3 Bla 22 53 57.74798 +16 08 53.5611   16.57 16.10 15.22   ~ 2556 2
87 QSO B2254+0727 BLL 22 57 17.30312249 +07 43 12.3024770   17.07 16.36     ~ 289 1

    Equat.    Gal    SGal    Ecl

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2021.02.24-19:30:25

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