Abstract
Being immensely powerful, and hence detectable out to great distances, classical double radio galaxies have long been recognised as cosmological probes of great potential. Before this potential can be realised, it is necessary to understand the physical mechanisms by which these objects evolve and change with time. This chapter describes how to deduce fromclassical double radio source observables (luminosity, spectral index, redshift and linear size) the essential nature of how these objects evolve and the true relationships between the underlying physical parameters (jet-power, age etc). I discuss the key role played by hotspots in governing the energy distribution of the lobes they feed, and subsequent spectral evolution.
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Blundell, K.M. (2002). The Evolution of Classical Double Radio Galaxies. In: Guthmann, A.W., Georganopoulos, M., Manolakou, K., Marcowith, A. (eds) Relativistic Flows in Astrophysics. Lecture Notes in Physics, vol 589. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-46025-X_4
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