scholarly journals The Polarization of Extended Radio Sources at 6 cm Wavelength. I. Extragalactic Sources

1971 ◽  
Vol 24 (4) ◽  
pp. 899 ◽  
Author(s):  
FF Gardner ◽  
JB Whiteoak
Keyword(s):  
Magnetic Fields ◽  
Linear Polarization ◽  
Radio Sources ◽  
Extragalactic Radio Sources ◽  
Extended Radio

Maps are presented of the linear polarization distributions over eight extragalactic radio sources. They were obtained at 6 cm wavelength with a 4' arc resolution. Low brightness extensions show polarization of up to 70% with magnetic fields aligned perpendicular to their elongations.

scholarly journals Comparison of Radio and Optical Polarization in Extended Extragalactic Radio Sources: II. Implications for the Magnetic Fields

1990 ◽  
Vol 140 ◽  
pp. 451-452
Author(s):  
K. Meisenheimer ◽  
H.-J. Röser
Keyword(s):  
Magnetic Fields ◽  
Radio Sources ◽  
Synchrotron Emission ◽  
Optical Polarization ◽  
Optical Studies ◽  
Extragalactic Source ◽  
Extragalactic Radio Sources ◽  
Extended Radio ◽  
Synchrotron Light

Although optical synchrotron light from an extragalactic source - the jet in M 87 - has been discovered more than 30 years ago (Baade 1956) there are still only a handful extended radio sources with established optical synchrotron emission (see Röser 1989 and references therein, also Meisenheimer et al. 1989b). We outline the relevance of optical studies and summarize some results concerning the magnetic fields in extragalactic radio sources.

Tables of physical and morphological properties of nearby extended radio galaxies

2021 ◽  
pp. 75-89
Author(s):  
R. R. Andreasyan ◽  
H. V. Abrahamyan
Keyword(s):  
Radio Galaxies ◽  
Elliptical Galaxies ◽  
Morphological Data ◽  
Morphological Properties ◽  
Radio Sources ◽  
Extragalactic Radio Sources ◽  
Extended Radio

It is brought the physical and morphological data of 267 nearby radio galaxies identified with elliptical galaxies brighter than 18th magnitude (sample 1) and for 280 extragalactic radio sources with known position angles between the integrated intrinsic radio polarization and radio axes (sample 2).

scholarly journals The Linear Polarization of Extragalactic Radio Sources at Milliarcsecond Resolution

1988 ◽  
Vol 129 ◽  
pp. 143-152
Author(s):  
J. F. C. Wardle ◽  
D. H. Roberts
Keyword(s):  
Linear Polarization ◽  
Radio Sources ◽  
Extragalactic Radio Sources ◽  
Vlbi Observations

We review the polarization sensitive VLBI observations of compact extragalactic radio sources that have been made to date, and discuss some preliminary physical results suggested by the data.

scholarly journals 9.10. The cause of the spectral turnover in the GPS source 0108+388: free-free absorption or SSA?

1998 ◽  
Vol 184 ◽  
pp. 401-402
Author(s):  
J. M. Marr ◽  
F. Crawford ◽  
G. B. Taylor
Keyword(s):  
Magnetic Fields ◽  
Radio Source ◽  
High Frequency ◽  
Radio Sources ◽  
Host Galaxies ◽  
Ionized Gas ◽  
High Frequencies ◽  
Extragalactic Radio Sources ◽  
Competing Models ◽  
Frequency Radiation

The radio source 0108 + 388 is a canonical example of a class of extragalactic radio sources, referred to as Gigahertz-Peaked Spectrum (GPS) sources, whose spectra peak at high frequencies. There are two competing models for the cause of the high frequency turnover: free-free absorption (f-f) of the lower frequency radiation by ionized gas in the host galaxies (e.g. van Breugel 1984), or synchrotron self-absorption (SSA) due to exceptionally large magnetic fields, (e.g. Hodges, Mutel, & Phillips 1984).

scholarly journals On the Magnetic Fields of Galaxies

2021 ◽  
pp. 470-477
Author(s):  
R. R. Andreasyan
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Faraday Rotation ◽  
Radio Galaxies ◽  
Morphological Properties ◽  
Radio Sources ◽  
Extragalactic Radio Sources

We bring results of some our investigations of magnetic field of our Galaxy and extragalactic radio sources. For the study were used data of Faraday rotation of pulsars and extragalactic radio sources as well as data of physical and morphological properties of more than 500 radio galaxies of different morphological classes.

scholarly journals Linear polarization measurements of extragalactic radio sources at λ6.3 cm

1999 ◽  
Vol 135 (3) ◽  
pp. 571-577 ◽  
Author(s):  
E. L.H. Zukowski ◽  
P. P. Kronberg ◽  
T. Forkert ◽  
R. Wielebinski
Keyword(s):  
Linear Polarization ◽  
Radio Sources ◽  
Extragalactic Radio Sources ◽  
Polarization Measurements

scholarly journals A new look at the galactic magnetic field

1979 ◽  
Vol 84 ◽  
pp. 317-319
Author(s):  
P. P. Kronberg ◽  
M. Simard-Normandin
Keyword(s):  
Magnetic Field ◽  
Faraday Rotation ◽  
Linear Polarization ◽  
Radio Sources ◽  
Galactic Magnetic Field ◽  
Equal Area ◽  
Large Sample ◽  
Extragalactic Radio Sources ◽  
First Order ◽  
New Look

We have measured the linear polarization of a new large sample of extragalactic radio sources, and by combining these with polarization values already in the literature, we have been able to compute a large number of rotation measures, with improved quality. We have also investigated the depolarization properties of these sources and as a result have been able to identify most sources with a large internally generated Faraday rotation. Figure 1 shows the rotation measures of 475 extragalactic radio sources on an equal-area projection, after “cleaning out” the extragalactic effects to first order.

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