http://arxiv.org/abs/1507.03355
Baldwin (1982) wrote that “the distribution of sources in the radio luminosity, P, overall physical size, D, diagram” could be considered as “the radio astronomer’s H-R diagram”. However, unlike the case of stars, not only the intrinsic properties of the jets, but also those of the host galaxy and the intergalactic medium are relevant to explain the evolutionary tracks of radio radio sources. In this contribution I review the current status of our understanding of the evolution of radio sources from a theoretical and numerical perspective, using the P-D diagram as a framework. An excess of compact (linear size < 10 kpc) sources could be explained by low-power jets being decelerated within the host galaxy, as shown by recent numerical simulations. These decelerated jets could also explain the population of the radio sources that have been recently classified as FR0. I will discuss the possible tracks that radio sources may follow within this diagram, and some of the physical processes that can explain the different tracks.
M. Perucho
Tue, 14 Jul 15
43/64
Comments: Submitted for publication in Astronomische Nachrichten. Review contribution to the proceedings of the 5th Workshop on CSS and GPS radio sources, held in Rimini (Italy) in May 2015
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