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A Dynamical Model for the Evolution of Hot Spots in Powerful Radio Sources

Published online by Cambridge University Press:  05 March 2013

M. Perucho  and
J. M. Martí
M. Perucho
Affiliation:
Departamento de Astronomía y Astrofísica, Universidad de Valencia, Dr. Moliner 50, 46100 Burjassot (Valencia), Spain. manuel.perucho@uv.es, jose-maria.marti@uv.es
J. M. Martí
Affiliation:
Departamento de Astronomía y Astrofísica, Universidad de Valencia, Dr. Moliner 50, 46100 Burjassot (Valencia), Spain. manuel.perucho@uv.es, jose-maria.marti@uv.es
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Abstract

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Compact symmetric objects 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/FR II 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 points to an interpretation of the CSO–FR II evolution in terms of decreasing jet power with time.

Keywords

galaxies: activegalaxies: jetsgalaxies: ISMradio continuum: galaxies
Type
GPS/CSS Workshop
Information
Publications of the Astronomical Society of Australia , Volume 20 , Issue 1 , 2003 , pp. 94 - 97
Copyright
Copyright © Astronomical Society of Australia 2003

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