Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011yera.confe..26m&link_type=abstract
The 41st Young European Radio Astronomers Conference, held at University of Manchester/Jodrell Bank Observatory, 18-20 July 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
The extended lobes and jets of radio galaxies often exhibit clear evidence of interaction with the cluster environment. But the mechanism of this feedback process, and the effect it has on both the jet and host galaxy evolution remains unclear. I will review analytic models that describe self-similar jet evolution for the radio-loud FR classified sources and investigate the regimes where external environmental effects might become significant. Using the radio power-jet length (PD) diagram as a tool to track this evolution, I plot the luminosities and newly-measured linear sizes of 433 FR sources, cross-matched in the FIRST, NVSS, and SDSS catalogues. This large sample of sources displays the same FRII/FRI dichotomy seen in earlier PD diagrams based around the 3CRR sample. By closely investigating the morphologies of the sub-set of sources that lay close to the dividing line, we hope to find trends that suggest the nature of the dichotomy, and whether it is dominated by intrinsic or environmental effects.
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