The death of FR II radio sources and their connection with radio relics
The death of FR II radio sources and their connection with radio relics
Radio relic sources in galaxy clusters are often described as the remnants of powerful radio galaxies. Here we develop a model for the evolution of such relics after the jets cease to supply energy to the lobes. This includes the treatment of a relic overpressured with respect to its gaseous surroundings even after the jets switch off. We also determine the radio emission of relics for a large variety of assumptions. We take into account the evolution of the strength of the magnetic field during the phase of relativistic particle injection into the lobes. The resulting spectra show mild steepening at around 1 GHz but avoid any exponential spectral cut-offs. The model calculations are used to fit the observed spectra of seven radio relics. The quality of the fits is excellent for all
galaxies: active, intergalactic medium, galaxies: jets, radio continuum: galaxies
649-658
Kaiser, Christian R.
28e00576-1e5b-47f1-b24c-fa10689717ab
Cotter, Garret
e48b0899-9f18-43bb-b5ce-efca53791591
2002
Kaiser, Christian R.
28e00576-1e5b-47f1-b24c-fa10689717ab
Cotter, Garret
e48b0899-9f18-43bb-b5ce-efca53791591
Kaiser, Christian R. and Cotter, Garret
(2002)
The death of FR II radio sources and their connection with radio relics.
Monthly Notice of the Royal Astronomical Society, 336 (2), .
Abstract
Radio relic sources in galaxy clusters are often described as the remnants of powerful radio galaxies. Here we develop a model for the evolution of such relics after the jets cease to supply energy to the lobes. This includes the treatment of a relic overpressured with respect to its gaseous surroundings even after the jets switch off. We also determine the radio emission of relics for a large variety of assumptions. We take into account the evolution of the strength of the magnetic field during the phase of relativistic particle injection into the lobes. The resulting spectra show mild steepening at around 1 GHz but avoid any exponential spectral cut-offs. The model calculations are used to fit the observed spectra of seven radio relics. The quality of the fits is excellent for all
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Published date: 2002
Keywords:
galaxies: active, intergalactic medium, galaxies: jets, radio continuum: galaxies
Identifiers
Local EPrints ID: 14781
URI: http://eprints.soton.ac.uk/id/eprint/14781
PURE UUID: 9cc49d58-1083-4d43-88b0-5ec510497dfb
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Date deposited: 28 Feb 2005
Last modified: 11 Dec 2021 13:55
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Contributors
Author:
Christian R. Kaiser
Author:
Garret Cotter
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