Radio Galaxy Spectra

Details Radio Galaxy Spectra Radio Galaxy Spectra

2001-01-22

arxiv.org/abs/astro-ph/0101367v1

Astronomy and Astrophysics

Astrophysics

4 pages, 3 figures, submitted to 'Particles & Fields in Radio Galaxies' eds Laing & Blundell, ASP conference series

Scientific paper

Radio spectra of radio galaxies are often ascribed a simple power law form ($S_{\nu} \propto \nu^{\alpha}$) with the spectral index, $\alpha$, being of order -0.7. However, all radio galaxies deviate from this simple power law behaviour. In this paper we derive simple expressions for the average rest-frame spectra of FRI and FRII radio galaxies. These will be used to describe the spectral curvature of the parent (FRI and FRII) populations in models of radio source evolution.

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