A dynamical model for the CSO-MSO-FRII evolution: hints from hot spot properties

Details A dynamical model for the CSO-MSO-FRII evolution: hints from hot spot properties A dynamical model for the CSO-MSO-FRII evolution: hints from hot spot properties

2004-07-28

arxiv.org/abs/astro-ph/0407576v1

Third GPS/CSS Workshop, 2003 PASA, 20 Number 1 pp.94-97

Astronomy and Astrophysics

Astrophysics

7 pages

Scientific paper

Compact Symmetric Objects (CSOs) are considered the young counterparts of large doubles according to advance speeds measured or inferred from spectral ageing. Here we present a simple power law model for the CSO/FRII evolution based on the study of sources with well defined hot-spots. The luminosity of the hot spots is estimated under minimum energy conditions. The advance of the source is considered to proceed in ram pressure equilibrium with the ambient medium. Finally, we also assume that the jets feeding the hot spots are relativistic and have a time dependent power. Comparison with observational data allows to interpret the CSO-FRII evolution in terms of decreasing jet power with time.

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