Optical polarization position angle versus radio source axis in radio galaxies

Nature ◽  
1982 ◽  
Vol 299 (5884) ◽  
pp. 605-606 ◽  
Author(s):  
Robert R. J. Antonucci
Keyword(s):  
Radio Source ◽  
Position Angle ◽  
Radio Galaxies ◽  
Optical Polarization

scholarly journals Jansky VLA observations of synchrotron emitting optical hotspots of 3C 227 and 3C 445 radio galaxies

2020 ◽  
Vol 494 (2) ◽  
pp. 2244-2253 ◽  
Author(s):  
M Orienti ◽  
G Migliori ◽  
G Brunetti ◽  
H Nagai ◽  
F D’Ammando ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Large Scale ◽  
Optical Emission ◽  
Position Angle ◽  
Radio Galaxies ◽  
Very Large Array ◽  
Peculiar Characteristic ◽  
Intensity Images ◽  
First Time ◽  
Shock Fronts

ABSTRACT We report results on deep Jansky Very Large Array (VLA) A-configuration observations at 22 GHz of the hotspots of the radio galaxies 3C 227 and 3C 445. Synchrotron emission in the optical on scales up to a few kpc was reported for the four hotspots. Our VLA observations point out the presence of unresolved regions with upper limit to their linear size of about 100 pc. This is the first time that such compact components in hotspots have been detected in a mini-sample, indicating that they are not a peculiar characteristic of a few individual hotspots. The polarization may reach values up to 70 per cent in compact (about 0.1 kpc scale) regions within the hotspot, indicating a highly ordered magnetic field with size up to a hundred parsecs. On larger scales, the average polarization of the hotspot component is about 30–45 per cent, suggesting the presence of a significant random field component, rather than an ordered magnetic field. This is further supported by the displacement between the peaks in polarized intensity and in total intensity images that is observed in all the four hotspots. The electric vector position angle is not constant, but changes arbitrarily in the central part of the hotspot regions, whereas it is usually perpendicular to the total intensity contours of the outermost edge of the hotspot structure, likely marking the large-scale shock front. The misalignment between X-ray and radio-to-optical emission suggests that the former is tracing the current particle acceleration, whereas the latter marks older shock fronts.

scholarly journals The optical polarization of the low-redshift radio galaxies 3CR 33, 305, 321 and 459

1993 ◽  
Vol 262 (4) ◽  
pp. 1029-1036 ◽  
Author(s):  
P. W. Draper ◽  
S. M. Scarrott ◽  
C. N. Tadhunter
Keyword(s):  
Radio Galaxies ◽  
Optical Polarization

scholarly journals RC J0311+0507: A Candidate to Superpowerful Radio Galaxies with z = 4.514

2006 ◽  
Vol 2 (S235) ◽  
pp. 431-431
Author(s):  
A. I. Kopylov ◽  
Yu. N. Parijskij ◽  
N. S. Soboleva ◽  
A. V. Temirova ◽  
O. V. Verkhodanov ◽  
...  
Keyword(s):  
Radio Source ◽  
Radio Galaxies ◽  
Strong Line ◽  
Radio Luminosity ◽  
Spectrum Radio

AbstractThe investigations of the ultra steep spectrum radio source RC J0311+0507 (4C+04.11) in radio (RATAN-600, VLA) and optics (6-m telescope SAO RAS) are presented. The identification of a strong line at 6703 Å with Lyα gives a redshift z=4.514. The object belongs to the group of extremely distant radio galaxies of ultrahigh radio luminosity (P1400 = 1.3 × 1029WHz−1).

Hosts of Powerful Radio Galaxies in the Near‐Infrared: Implications for Radio Source Evolution

1998 ◽  
Vol 503 (1) ◽  
pp. 156-167 ◽  
Author(s):  
W. H. de Vries ◽  
C. P. O'Dea ◽  
S. A. Baum ◽  
E. Perlman ◽  
M. D. Lehnert ◽  
...  
Keyword(s):  
Radio Source ◽  
Near Infrared ◽  
Radio Galaxies ◽  
Powerful Radio

Optical polarization in distant radio galaxies

1993 ◽  
Vol 264 (2) ◽  
pp. 421-438 ◽  
Author(s):  
Andrea Cimatti ◽  
Sperello di Serego Alighieri ◽  
Robert A. E. Fosbury ◽  
Marco Salvati ◽  
Duncan Taylor
Keyword(s):  
Radio Galaxies ◽  
Optical Polarization

scholarly journals Large-scale HI in nearby radio galaxies: segregation in neutral gas content with radio source size

2007 ◽  
Vol 464 (2) ◽  
pp. L1-L4 ◽  
Author(s):  
B. H. C. Emonts ◽  
R. Morganti ◽  
T. A. Oosterloo ◽  
J. M. van der Hulst ◽  
G. van Moorsel ◽  
...  
Keyword(s):  
Radio Source ◽  
Large Scale ◽  
Radio Galaxies ◽  
Source Size ◽  
Gas Content ◽  
Neutral Gas

[ITAL]HUBBLE SPACE TELESCOPE[/ITAL][ITAL]Hubble Space Telescope[/ITAL] Snapshot Survey of 3CR Radio Source Counterparts. III. Radio Galaxies with [FORMULA][F]z<0.1[/F][/FORMULA]

1999 ◽  
Vol 122 (1) ◽  
pp. 81-108 ◽  
Author(s):  
André R. Martel ◽  
Stefi A. Baum ◽  
William B. Sparks ◽  
Eric Wyckoff ◽  
John A. Biretta ◽  
...  
Keyword(s):  
Radio Source ◽  
Hubble Space Telescope ◽  
Radio Galaxies ◽  
Space Telescope
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