Relativistic Jets and the Fanaroff-Riley Classification of Radio Galaxies
نویسندگان
چکیده
منابع مشابه
Relativistic Jets in Radio-Weak Quasars and LINER Galaxies
We discuss radio observations of a sample of radio-weak and radio-intermediate quasars which demonstrate that – just like their radio-loud counterparts – radioweak quasars too have relativistic jets in their nuclei. Moreover, a VLA survey of nearby LINER galaxies reveals a relatively large number of flat-spectrum radio cores. It is suggested that those cores are also best explained by moderatel...
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We link the lack of FR I type structure among quasars to the void of radio loud quasars below a critical disk luminosity of ∼ 10 erg/sec in the PG sample. We argue that the opening angle of the obscuring torus in radio loud quasars depends on the power of the central engine, approaching the jet’s beaming angle near the FR I/FR II break. Consequently, low power radio quasars would either be clas...
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We investigate the nature of the point-like optical " cores " that have been found in the centres of the host galaxies of a majority of radio galaxies by the Hubble Space Telescope. We examine the evidence that these optical cores are relativistically beamed, and look for differences in the behaviour of the cores found in radio galaxies of the two Fanaroff-Riley types. We also attempt to relate...
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A small fraction of double radio sources show a peculiar and striking hybrid morphology; they have a distinctly FR I structure on one side of the nucleus, and a FR II structure on the other. We argue that the mere existence of these HYMORS is quite incompatible with the theoretical explanations for the Fanaroff–Riley dichotomy that are based upon the nature of the jet plasma, or those invoking ...
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We provide observational and theoretical perspectives on the currently much debated issue of the Fanaroff-Riley (FR) morphological dichotomy of extragalactic radio sources. In this context we introduce a new, albeit rare, class of double radio sources in which the two lobes exhibit clearly different FR morphologies. It is argued that such ‘HYbrid MOrphology Radio Sources’, or HYMORS, could be u...
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ژورنال
عنوان ژورنال: The Astrophysical Journal Supplement Series
سال: 1995
ISSN: 0067-0049,1538-4365
DOI: 10.1086/192232