Radio galaxy evolution: what you can learn from a Brief Encounter

Abstract

We describe the pitfalls encountered in deducing from classical double radio source observables (luminosity, spectral index, redshift and linear size) the essential nature of how these objects evolve. We discuss the key role played by hotspots in governing the energy distribution of the lobes they feed, and subsequent spectral evolution. We present images obtained using the new 74 MHz receivers on the VLA and discuss constraints which these enforce on models of the backflow and ages in classical doubles.

invited talk at `Lifecycles of Radio Galaxies' workshop; eds John Biretta et al

References in corpus (7)

• The Nature and Evolution of Classical Double Radio Sources from Complete Samples
• The radio luminosity function from the low-frequency 3CRR, 6CE & 7CRS complete samples
• Evolutionary tracks of FRII sources through the P-D diagram
• The spectra and energies of classical double radio lobes
• HST, radio and infrared observations of 28 3CR radio galaxies at redshift z ~ 1: I. Old stellar populations in central cluster galaxies
• The inevitable youthfulness of known high-redshift radio galaxies
• The Linear-Size Evolution of Classical Double Radio Sources

Cited by in corpus (4)

• Radio galaxies in the 2SLAQ Luminous Red Galaxy Survey: I. The evolution of low-power radio galaxies to z~0.7
• AGN Jet-induced Feedback in Galaxies. I. Suppression of Star Formation
• A new search for distant radio galaxies in the Southern hemisphere -- III. Optical spectroscopy and analysis of the MRCR--SUMSS sample
• Diffuse Radio Emission in Abell 754