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Andreasyan, R. R.; Appl, S.; Sol, H.

doi:10.1023/a:1016017016598

Cited by 11 publications

(13 citation statements)

References 10 publications

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“…For this study we have used data for 267 nearby radio galaxies identified with elliptical galaxies brighter than 18th magnitude (sample1) (Andreasyan & Sol, 1999), and 280 extragalactic radio sources with known position angles between the integrated intrinsic radio polarization and radio axes (sample 2) (Andreasyan et al, 2002). For nearby radio sources, we have data: on the position angles of the optical images (oPA) of elliptical galaxies, found mainly from the Palomar maps, the position angles of radio image (rPA), angles between optical and radio axes (dPA), and FR classes taken from the literature.…”

Section: Observational Datamentioning

confidence: 99%

The role of dipolar magnetic field of AGN in the morphology and evolution of extragalactic radio sources

Andreasyan

2019

ComBAO

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We discuss a model of formation of extragalactic radio sources when the parent optical galaxy has a large-scale dipolar magnetic field. The study of dynamics of ejected from the central part of optical galaxy clouds of relativistic particles in dipolar magnetic field gives a possibility to explain main morphological features and physical properties of formed extragalactic radio sources. We bring some results of statistical analyses and correlations between physical parameters for a large sample of extragalactic radio sources.

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Section: Observational Datamentioning

confidence: 99%

The role of dipolar magnetic field of AGN in the morphology and evolution of extragalactic radio sources

Andreasyan

2019

ComBAO

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“…Here parallel to the Fanaroff-Riley classification we bring a simple classification of extragalactic radio sources by the elongation parameter K (K is the ratio of the largest dimension of the radio image to the dimension of image in perpendicular direction). For the study we have used data for 267 nearby radio galaxies (sample1) (Andreasyan & Sol, 1999), and 280 extragalactic radio sources (sample 2) from (Andreasyan et al., 2002). Sample 1 and 2 are brought in Andreasyan (2012).…”

Section: Abstract Radio Galaxies Fri Frii Morphologymentioning

confidence: 99%

Study of some morphological features of extragalactic radio sources of FRI and FRII types

Andreasyan

Hovhannisyan²,

Paronyan

et al. 2013

Proc. IAU

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It was used the date of more than 650 extragalactic radio sources for the study of distribution of spectral indexes and elongation for the radio sources of different Fanaroff Riley (FR) classes. It was shown, that no large differences are observed in the distribution of spectral indexes in radio sources FRI and FRII classes. From the study of distribution of the elongation of extragalactic radio sources it was found the following basic morphological differences for the objects of different FR classes: a) the radio images of extragalactic radio sources FRII type in the average are more elongated than the radio images of extragalactic radio sources FRI type: b) the extragalactic radio sources FRI type can be divided on two subtypes with two function of distribution of the elongation parameter K having different maximums. These two subtypes of radio sources of FRI class, in besides of different average elongation of radio images, probably must have also differences in the orientations of these elongation directions relative to the direction of rotation axes of parent optical galaxies that in most cases are coincide with the minor optical axes of galaxies.

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“…Note that the presence of a large amount of rotating gas-dust component in the central region of active galaxies, as well as rapid outflow of matter from these regions, provide good conditions for the formation and enhancement of poloidal magnetic fields, which in turn can favor the formation of radio galaxies of differing morphological types [8,9,20].…”

Section: Introductionmentioning

confidence: 99%