2010A&A...523A...9H


Query : 2010A&A...523A...9H

2010A&A...523A...9H - Astronomy and Astrophysics, volume 523, A9-9 (2010/11-2)

The asymmetric radio structure and record jet of giant quasar 4C 34.47.

HOCUK S. and BARTHEL P.D.

Abstract (from CDS):

Unification models for active galactic nuclei, AGN, predict that all quasars (radio sources associated with quasi-stellar objects) should be at a substantial angle with the sky plane. We test the predictions of the orientation unification model with the morphological and polarization properties of a giant quasar. The giant double-lobed radio source 4C34.47, which is associated with quasi-stellar object B1721+343, is mapped at arcsecond scale resolution, and the data are subsequently analyzed within the context of current models for extragalactic radio sources. Quasar 4C34.47 displays a straight one-sided jet, measuring a record length of 380kpc in its double-lobed radio structure. Assuming an intrinsically symmetric two-sided jet structure the radio source jet axis must be at least 33° away from the sky plane, that is within 57° from the line of sight. The radio polarization properties indicate that this giant source has largely outgrown the depolarizing halo that is generally associated with the host galaxies of powerful radio sources. The measured small depolarization asymmetry nevertheless agrees with its inferred orientation. All data for this giant radio source agree with its preferred orientation as predicted within the unification scheme for powerful radio sources. Seen under a small aspect angle the radio source is large, but not excessively large. The global properties of 4C34.47 do not differ from other giant (old) FR2 radio sources: it is a slowly expanding low-luminosity radio source.

Abstract Copyright:

Journal keyword(s): galaxies: active - quasars: individual: 4C34.47

Simbad objects: 14

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Number of rows : 14
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 NGC 315 LIN 00 57 48.88334410 +30 21 08.8119345 12.80 12.20 11.16 11.26   ~ 775 2
2 2E 437 Sy1 01 36 24.4208152464 +20 57 27.522990972   18.15 18.10     ~ 357 2
3 2MASSI J0754079+431610 Sy1 07 54 07.9625084328 +43 16 10.591333428   17.66 17.42     ~ 45 0
4 3C 234.0 Sy1 10 01 49.5227371368 +28 47 08.943487440   18.21 17.27     ~ 423 1
5 ICRF J100601.7+345410 Sy2 10 06 01.75023017 +34 54 10.4016113   15.97       ~ 444 2
6 OHIO L 550 rG 10 33.2 +56 45           ~ 18 0
7 QSO J1130-1320 QSO 11 30 19.9537066512 -13 20 50.278137828   16.35 18.5 16.0   ~ 26 1
8 4C 34.37 rG 12 32 41.4 +34 42 54   23       ~ 34 1
9 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4271 2
10 NVSS J142023-054532 rG 14 20 23.809 -05 45 28.56       19.65 18.44 ~ 19 0
11 2MASX J15113138+0715068 LIN 15 11 31.3765 +07 15 07.129   15.1       ~ 39 1
12 ICRF J172320.7+341757 Sy1 17 23 20.7958610952 +34 17 57.967381860   15.58 15.46     ~ 305 1
13 7C 173240.70+385949.00 BLL 17 34 20.57853650 +38 57 51.4430945   19.5 19 19.00   ~ 194 1
14 ICRF J204237.3+750802 Sy1 20 42 37.3079247456 +75 08 02.445851940     14.46 13.80   ~ 251 0

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2023.11.28-21:43:24

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