1999MNRAS.302L..60S

Query : 1999MNRAS.302L..60S

1999MNRAS.302L..60S - Mon. Not. R. Astron. Soc., 302, L60-L64 (1999/February-1)

Polarization of radio cores as a test of unified schemes.

SAIKIA D.J.

Abstract (from CDS):

In unified schemes for extragalactic radio sources, quasars and BL Lac objects are intrinsically similar to Fanaroff–Riley class II and I radio galaxies respectively, but appear to be different because they are viewed at different angles to the line of sight. Quasars and BL Lac objects are observed at small viewing angles, while radio galaxies lie close to the plane of the sky. In such schemes, a quasar or BL Lac nucleus is hidden from our view by a putative torus when the source is inclined at a large angle to the line of sight, and it then appears as a radio galaxy. Such a scenario should also affect the observed polarization properties of cores, with the cores in radio galaxies and weak-cored quasars being less polarized than those of core-dominated quasars and BL Lacs because of Faraday depolarization by the magnetoionic medium in the obscuring torus or disc. In this paper, we report that the core polarization of radio galaxies and weak-cored quasars is indeed much smaller than for core-dominated quasars and BL Lacs. We suggest that this is a result of the depolarization caused by the obscuring torus or disc, providing further evidence in favour of unified schemes.

Abstract Copyright: 1999, Royal Astronomical Society

Journal keyword(s): polarization - galaxies: active - BL Lacertae objects: general - galaxies: nuclei - quasars: general - radio continuum: galaxies

Simbad objects: 72

goto Full paper

goto View the references in ADS

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 3C 20 Sy2 00 43 09.18053760 +52 03 36.1486440   19.0       ~ 221 1
2 QSO B0048-09 BLL 00 50 41.3172421464 -09 29 05.210474100 16.74 16.39 16.22 16.14   ~ 480 2
3 NGC 315 LIN 00 57 48.88334410 +30 21 08.8119345 12.80 12.20 11.16 11.26   ~ 869 2
4 NGC 383 AGN 01 07 24.9647814840 +32 24 45.132586200   13.6 12.14     ~ 821 3
5 QSO B0109+224 BLL 01 12 05.8247044608 +22 44 38.785880796   16.00 15.66 15.47   ~ 373 2
6 Z 502-27 rG 01 19 35.00087601 +32 10 50.0619670   16 14.5     ~ 249 1
7 QSO B0118-272 BLL 01 20 31.6628068344 -27 01 24.636341064   15.89 15.56 15.49   ~ 288 1
8 1RXS J014126.8-092857 BLL 01 41 25.83216015 -09 28 43.6742470   16.94 16.55 17.21   ~ 302 1
9 Z 538-57 Sy1 02 23 11.41124925 +42 59 31.3853324   15.71 14.81     ~ 582 2
10 QSO B0235+1624 BLL 02 38 38.93010450 +16 36 59.2745528   16.46 15.50 15.92   ~ 1614 2
11 NGC 1218 Sy1 03 08 26.22380005 +04 06 39.3007808   12.84       ~ 413 0
12 3C 79.0 Sy2 03 10 00.0936589848 +17 05 58.599361932   19.54 18.75     ~ 268 3
13 NGC 1265 rG 03 18 15.674 +41 51 27.94   14.7       ~ 386 2
14 NGC 1275 Bla 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 4243 3
15 Z 541-15 rG 03 29 23.8863408096 +39 47 31.958110536   14.9       ~ 99 0
16 QSO B0338-214 BLL 03 40 35.60785848 -21 19 31.1721373   16.04 17.1 17.07   ~ 182 1
17 QSO B0406+121 BLL 04 09 22.00871072 +12 17 39.8476330   20.5   18.27   ~ 112 1
18 3C 111 Sy1 04 18 21.2772425736 +38 01 35.801359968   19.75 18.05     ~ 1002 2
19 QSO B0422+004 BLL 04 24 46.8421990080 +00 36 06.329375028 16.15 15.94 16.98     ~ 378 1
20 MCG+01-12-009 Bla 04 33 11.0956735296 +05 21 15.619461552   15.72 15.05 10.08   ~ 2099 2
21 3C 132 rG 04 56 42.922 +22 49 23.06   18.5       ~ 157 1
22 QSO B0454+844 BLL 05 08 42.36351222 +84 32 04.5441733     16.5 18.95   ~ 250 1
23 3C 136.1 Sy2 05 16 03.133 +24 58 25.47   17       ~ 88 1
24 QSO B0537-441 BLL 05 38 50.36155950 -44 05 08.9390233   15.77 16.48 16   ~ 924 2
25 3C 171.0 Sy2 06 55 14.7385158451 +54 08 57.427918985   19.94 19.08     ~ 264 1
26 8C 0716+714 BLL 07 21 53.4482942664 +71 20 36.363846516   15.5 15.50 14.27   ~ 1388 1
27 QSO J0738+1742 BLL 07 38 07.39375312 +17 42 18.9981506   16.76 16.22 15.78   ~ 1045 1
28 3C 184.1 Sy2 07 43 01.3778005643 +80 26 26.042651834     17.0     ~ 190 1
29 QSO B0808+019 BLL 08 11 26.70731711 +01 46 52.2201568   17.58 17.2 17.96   ~ 281 1
30 7C 081451.89+423206.00 BLL 08 18 15.99961476 +42 22 45.4148987   18.88 18.18 17.81   ~ 429 1
31 3C 197.1 BLL 08 21 33.6000545232 +47 02 37.303572516   18.08 17.33     ~ 142 1
32 QSO B0823+033 BLL 08 25 50.33835759 +03 09 24.5199749   17.81 17.23 16.91   ~ 352 1
33 QSO B0823-223 BLL 08 26 01.5730900658 -22 30 27.204409684   16.11 16.20     ~ 224 1
34 6C 082850+492334 BLL 08 32 23.21674252 +49 13 21.0382979   20.17 19.63     ~ 173 1
35 PG 0851+202 BLL 08 54 48.8749846272 +20 06 30.639583620   15.649 15.146 15.446   ~ 2513 1
36 3C 219 Sy1 09 21 08.6258123424 +45 38 57.358202856   19.56 18.69     ~ 424 2
37 7C 093818.10+395820.00 Sy2 09 41 24.0268234920 +39 44 41.809159068   16.36 16.4     ~ 195 2
38 ATO J146.9381+07.4223 Sy1 09 47 45.1433922288 +07 25 20.595729756   17.37 16.95     ~ 389 1
39 6C 095456+654857 BLL 09 58 47.2451872176 +65 33 54.819354600     17.0 15.75   ~ 771 1
40 QSO B1144-3755 BLL 11 47 01.37071212 -38 12 11.0235229   19.03 16.2 16.72   ~ 320 1
41 7C 1147+2434 BLL 11 50 19.21218244 +24 17 53.8352318   16.26 15.74 15.80   ~ 294 1
42 7C 1219+2830 BLL 12 21 31.6904439888 +28 13 58.500308172   16.81 16.11 14.24   ~ 924 1
43 8C 1221+809 BLL 12 23 40.49375661 +80 40 04.3404140     19.0 19.3   ~ 119 1
44 2MASX J13110466+2728070 Sy2 13 11 04.6615315248 +27 28 07.229535420   18.93 18.00     ~ 200 1
45 NAME Centaurus A BLL 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4774 3
46 QSO B1413+135 BLL 14 15 58.81751033 +13 20 23.7128587   21.055 20.000 18.461   ~ 476 1
47 6C 141804+543700 BLL 14 19 46.5974051952 +54 23 14.787857796   16.17 15.65 14.16   ~ 630 1
48 ESO 514-1 BLL 15 17 41.8134049824 -24 22 19.482207024   15.13 14.00 13.95   ~ 815 3
49 QSO B1519-273 BLL 15 22 37.67599511 -27 30 10.7855131   18.72 18.5 17.42   ~ 313 1
50 4C 14.60 BLL 15 40 49.49151924 +14 47 45.8846989   17.72 17.30 17.240   ~ 448 1
51 NGC 6251 Bla 16 32 31.96989253 +82 32 16.3999044 15.24 14.66 12.89 7.62   ~ 772 1
52 8C 1704+608 Bla 17 04 41.3742408840 +60 44 30.520617000   15.65 15.40 15.30   ~ 782 1
53 QSO B1717+178 BLL 17 19 13.04848035 +17 45 06.4371847   20.10 19.1 17.28   ~ 247 1
54 RX J1748.5+7005 BLL 17 48 32.8402992264 +70 05 50.768819304   17.46 17.01 15.48   ~ 456 2
55 1RXS J180043.6+782806 BLL 18 00 45.6838528560 +78 28 04.018028016   16.4 15.90 16.134   ~ 793 1
56 Z 340-35 BLL 18 06 50.6802916920 +69 49 28.109609256   14.77 14.22 11.39   ~ 909 1
57 4C 56.27 BLL 18 24 07.06837171 +56 51 01.4908155   18.9 19.30 16.48   ~ 510 1
58 3C 381.0 Sy2 18 33 46.2946146576 +47 27 02.566037088   18.64 17.24     ~ 209 1
59 Z 173-14 Sy1 18 35 03.3896172576 +32 41 46.855964616   16.50 15.39 10.50   ~ 688 1
60 3C 390.3 Bla 18 42 08.9904975672 +79 46 17.127835104   16.06 15.38     ~ 1381 1
61 3C 388.0 SyG 18 44 02.3840387736 +45 33 29.628672300   16.91 15.56     ~ 338 1
62 QSO B1921-293 BLL 19 24 51.05595254 -29 14 30.1210248   18.71 18.21 15.07   ~ 918 1
63 3C 401 SyG 19 40 25.116 +60 41 34.97   19.1       ~ 206 1
64 8C 2007+777 BLL 20 05 30.9987913056 +77 52 43.248139536     16.5 17.36   ~ 474 1
65 4C 72.28 BLL 20 09 52.3047264984 +72 29 19.351077612   19.0   19.40   ~ 127 1
66 3C 424 BLL 20 48 12.030 +07 01 17.48   18 18.40     ~ 149 1
67 3C 433.0 Sy2 21 23 44.5778423928 +25 04 27.670672416   17.660 16.350     ~ 338 1
68 4C -02.81 BLL 21 34 10.30958988 -01 53 17.2389056   18.6 19.00 18.87   ~ 431 1
69 QSO B2150+173 BLL 21 52 24.81939266 +17 34 37.7950210     17.9 17.98   ~ 186 2
70 2C 1820 SyG 21 55 52.324 +38 00 28.51   19.20       ~ 234 1
71 NAME BL Lac BLL 22 02 43.2913536816 +42 16 39.979416792   15.66 14.72     ~ 2397 1
72 QSO B2254+0727 BLL 22 57 17.30311778 +07 43 12.3025633   17.07 16.36     ~ 317 1

To bookmark this query, right click on this link: simbad:objects in 1999MNRAS.302L..60S and select 'bookmark this link' or equivalent in the popup menu