2003ApJ...589..126Z

Query : 2003ApJ...589..126Z

2003ApJ...589..126Z - Astrophys. J., 589, 126-146 (2003/May-3)

A view through Faraday's fog: parsec-scale rotation measures in active galactic nuclei.

ZAVALA R.T. and TAYLOR G.B.

Abstract (from CDS):

Rotation measure observations of nine quasars, four BL Lacertae objects, and three radio galaxies are presented. The rest-frame rotation measures in the cores of the quasars and the jets of the radio galaxy M87 are several thousand rad/m2. The BL Lac objects and the jets of the quasars have rest-frame rotation measures of a few hundred rad/m2. A core rotation measure of 500 rad/m2 in the rest frame is suggested as the dividing line between quasars and BL Lac objects. The substantial rotation measures of the BL Lac objects and quasars cast doubt on the previous polarization position angle investigations of these objects at frequencies of 15 GHz or less. BL Lac itself has a rotation measure that varies in time, similar to the behavior observed for the quasars 3C 273 and 3C 279. A simple model with magnetic fields of 40 µG or less can account for the observed rotation measures.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Active - Galaxies: ISM - Galaxies: Jets - Galaxies: Nuclei - Radio Continuum: Galaxies

Simbad objects: 24

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Number of rows : 24
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 6C 013354+473615 Bla 01 36 58.59480326 +47 51 29.1000720     19.50 19.25 15.21 ~ 537 1
2 6C 021252+733537 BLL 02 17 30.81335327 +73 49 32.6217355     19.00 18.97   ~ 485 1
3 3C 111 Sy1 04 18 21.2772425736 +38 01 35.801359968   19.75 18.05     ~ 1002 2
4 QSO B0420-0127 Bla 04 23 15.80072217 -01 20 33.0656073   17.50 17.00 16.28   ~ 1263 3
5 MCG+01-12-009 Bla 04 33 11.0956735296 +05 21 15.619461552   15.72 15.05 10.08   ~ 2099 2
6 QSO J0530+13 Bla 05 30 56.41674741 +13 31 55.1494688     20.00 19.35   ~ 1004 1
7 ICRF J064524.0+212151 Sy2 06 45 24.09954730 +21 21 51.2008841   19.5       ~ 139 1
8 PG 0851+202 BLL 08 54 48.8749846272 +20 06 30.639583620   15.649 15.146 15.446   ~ 2513 1
9 4C 39.25 Bla 09 27 03.01394144 +39 02 20.8518067   17.17 17.00 16.486   ~ 1036 1
10 3C 273 BLL 12 29 06.6998257176 +02 03 08.597629980   13.05 14.830 14.11   ~ 6022 1
11 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
12 3C 279C4 Rad 12 56 11.0 -05 47 21           ~ 25 0
13 3C 279 Bla 12 56 11.16657958 -05 47 21.5251510   18.01 17.75 15.87   ~ 3205 2
14 US 371 BLL 13 10 28.66385420 +32 20 43.7828340   15.61 15.24 17.91   ~ 917 1
15 NAME Centaurus A BLL 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4774 3
16 QSO B1445+101 Bla 14 45 16.46525080 +09 58 36.0727447   18.58 17.78     ~ 408 2
17 6C 161147+342017 Bla 16 13 41.06424322 +34 12 47.9088535   17.98 17.46 17.07   ~ 673 1
18 3C 345 Bla 16 42 58.80997043 +39 48 36.9939552   16.81 16.59 16.84   ~ 1808 3
19 1RXS J180043.6+782806 BLL 18 00 45.6838528560 +78 28 04.018028016   16.4 15.90 16.134   ~ 793 1
20 4C 56.27 BLL 18 24 07.06837171 +56 51 01.4908155   18.9 19.30 16.48   ~ 510 1
21 QSO B2005+40 Bla 20 07 44.9449261536 +40 29 48.603352020   18.5 19.00 20.3   ~ 319 1
22 QSO B2021+614 Bla 20 22 06.68174620 +61 36 58.8047323     19.00 17.58   ~ 335 1
23 NAME BL Lac BLL 22 02 43.2913536816 +42 16 39.979416792   15.66 14.72     ~ 2397 1
24 3C 454.3 Bla 22 53 57.7480438728 +16 08 53.561508864   16.57 16.10 15.22   ~ 3004 2

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