A single population scheme for FR I and FR II radio galaxies

Details A single population scheme for FR I and FR II radio galaxies A single population scheme for FR I and FR II radio galaxies

2002-11-27

arxiv.org/abs/astro-ph/0211613v1

NewAstron.Rev.47:225-229,2003

Astronomy and Astrophysics

Astrophysics

LaTeX, 6 pages, 1 fig: Elsevier science format - NAR. Proceedings of the workshop "Radio galaxies: past, present & future". ed

Scientific paper

10.1016/S1387-6473(03)00030-7

The presence of two distant FR I radio galaxies in the Hubble Deep Field plus Flanking Fields indicates that the number density of these objects is about 10-50 times higher at z>1 than in the local universe. This is in strong contrast with the idea that FR Is undergo no cosmological evolution. We advocate that the cosmological evolution of radio sources may be independent of FR class, and instead solely a function of radio power. In this scenario the evolutionary properties of extragalactic radio sources can be fully described within a `single population scheme'.

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