Origin of Magnetic Fields in Jets and Radio Galaxies

1990 ◽  
pp. 443-444
Author(s):  
William K. Rose
Keyword(s):  
Magnetic Fields ◽  
Radio Galaxies

scholarly journals On the correlation of the highest energy cosmic rays with AGNs

2009 ◽  
Vol 5 (H15) ◽  
pp. 251-253
Author(s):  
Vitor de Souza ◽  
Peter L. s Biermman
Keyword(s):  
Energy Spectrum ◽  
Cosmic Rays ◽  
Magnetic Fields ◽  
Present Status ◽  
Cosmic Ray ◽  
Radio Galaxies ◽  
Pierre Auger Observatory ◽  
Heavy Nuclei ◽  
Measured Energy

AbstractIn this paper we briefly discuss the present status of the cosmic ray astrophysics under the light of the new data from the Pierre Auger Observatory. The measured energy spectrum is used to test the scenario of production in nearby radio galaxies. Within this framework the AGN correlation would require that most of the cosmic rays are heavy nuclei and are widely scattered by intergalactic magnetic fields.

scholarly journals Collimated Bipolar Outflow and the Formation of Nuclear Spirals; Possible Role of Magnetic Fields

1990 ◽  
Vol 140 ◽  
pp. 447-448
Author(s):  
P. Pismis ◽  
E. Moreno ◽  
A. Garcia-Barreto
Keyword(s):  
Magnetic Fields ◽  
Active Galactic Nuclei ◽  
Galactic Nuclei ◽  
Radio Galaxies ◽  
The Past ◽  
Bipolar Outflow ◽  
The Difference ◽  
Observational Techniques ◽  
Quasars And Radio Galaxies

The existence of non–steady phenomena, namely activity in the form of radial motions (outflow) of matter from the nuclei of galaxies is well established at present. Active Galactic Nuclei (AGN) constitute a topic of great interest and are intensively studied by all existing observational techniques. Conventionally objects classified as AGN span a range from quasars, radio galaxies to Seyferts 1 and 2. It appears, however, that there exist galaxies which exhibit somewhat milder activity which does not qualify their inclusion in the AGN group. The designation of MAGN (M for mildly) was suggested in the past (Pismis, 1986) to cover the less energetic nuclei. It may be reasonable to consider that active nuclei form a sequence, the difference along it being due to the energetics of the nuclei, from the most active quasars and radio galaxies down to the mildest ones like M31 or our Galaxy. The phenomenon underlying the activity may thus be universal, subject to the intrinsic energetics of the nuclei (Pismis, 1987).

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.

Extreme Rotation Measure Radio Galaxies Measuring Cluster Magnetic Fields

1996 ◽  
Vol 175 ◽  
pp. 159-162 ◽  
Author(s):  
C.L. Carilli ◽  
R.A. Perley ◽  
G. Miley ◽  
H. Röttgering ◽  
R. Van OJIK
Keyword(s):  
Magnetic Fields ◽  
Wavelength Dependence ◽  
Radio Galaxies ◽  
Cygnus A ◽  
Rotation Measure ◽  
Polarized Emission

Slysh (1966) first pointed out the bizarre properties of the polarized emission from Cygnus A: a strong wavelength dependence on fractional polarization, and a large difference in rotation measures (RMs) for the (integrated) emission from each lobe. These properties were confirmed, but not resolved, in the work of Mitton (1971) and Alexander et al., (1984).

scholarly journals Magnetic Fields of Radio Galaxies in Abell Clusters 115 and 568

1990 ◽  
Vol 140 ◽  
pp. 495-496
Author(s):  
L. Gregorini ◽  
M. Bondi ◽  
L. Feretti ◽  
G. Giovannini ◽  
C.P. O'dea
Keyword(s):  
Magnetic Fields ◽  
Radio Galaxies ◽  
Abell Clusters ◽  
Intermediate Redshift

Abell 115 is an intermediate–redshift cluster (z=0.1971) well studied at different wavelengths (see Giovannini et al., 1987 and references therein).

Magnetic fields and radio jets in giant radio galaxies

Astrophysics ◽  
1995 ◽  
Vol 38 (4) ◽  
pp. 389-389
Author(s):  
M. A. Hovhannissian
Keyword(s):  
Magnetic Fields ◽  
Radio Galaxies ◽  
Radio Jets

scholarly journals Large-Scale Galactic and Intergalactic Magnetic Fields

1990 ◽  
Vol 140 ◽  
pp. 90-94
Author(s):  
M. Fujimoto ◽  
T. Sawa
Keyword(s):  
Magnetic Fields ◽  
Radio Emission ◽  
Faraday Rotation ◽  
Large Scale ◽  
Spiral Galaxies ◽  
Radio Galaxies ◽  
Density Waves ◽  
Dynamo Theory ◽  
Spiral Density Waves

Large-scale axisymmetric and bisymmetric spiral (ASS and BSS) structures are found of magnetic fields in spiral galaxies by measuring the Faraday rotation of polarized radio emission. Dynamo theory is introduced to explain the field structures, and strong magnetogravitational interaction is suggested to occur between the BSS magnetic fields and spiral density waves. Up-to-date data about the rotation measures RM and redshifts z of QSOs and distant radio galaxies are given for discussing large-scale intergalactic magnetic fields.

scholarly journals Neutrino Emission from Galaxies and Mechanisms for Producing Radio Lobes

1981 ◽  
Vol 94 ◽  
pp. 173-174
Author(s):  
R. Silberberg ◽  
M. M. Shapiro
Keyword(s):  
Black Holes ◽  
Magnetic Fields ◽  
Event Rate ◽  
Radio Galaxies ◽  
High Energy ◽  
Neutrino Emission ◽  
Powerful Radio ◽  
Neutrino Fluxes ◽  
Type Detector

In the context of the proposed DUMAND-type detector for high-energy neutrinos, it is important to estimate the neutrino fluxes from powerful radio galaxies. This would indicate whether a detectable event rate can be expected, and would help choose among possible mechanisms for generating the radio lobes associated with many such galaxies. Among the models that have been proposed are: (a) a beam from the galactic core that interacts with the extragalactic medium; (b) ejection of clouds of plasma, particles, and magnetic fields into the lobes, either in an explosive burst, or by diffusive escape; (c) black holes or spinars ejected from the galactic nucleus by a gravitational slingshot mechanism.

scholarly journals Origin of Magnetic Fields in Jets and Radio Galaxies

1990 ◽  
Vol 140 ◽  
pp. 443-444
Author(s):  
William K. Rose
Keyword(s):  
Magnetic Fields ◽  
Background Radiation ◽  
Cosmic Background Radiation ◽  
Radio Galaxies ◽  
Active Galaxies ◽  
Electron Drift ◽  
Cosmic Background ◽  
Ambient Gas

Jets are known to be emitted from the centers of active galaxies and quasars. In two recent papers (Rose, 1987, 1989) calculations of magnetic fields generated in jets because electrons drift with respect to protons have been described. Electron drift velocities can result from interaction with the cosmic background radiation or with ambient gas. We describe how magnetic fields can be generated in jets and radio galaxies.

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