The University of Southampton
University of Southampton Institutional Repository

A self-similar model for extragalactic radio sources

Kaiser, C.R. and Alexander, P. (1997) A self-similar model for extragalactic radio sources Monthly Notices of the Royal Astronomical Society, 286, (1), pp. 215-222.

Record type: Article


An analytical model for extragalactic radio sources with pressure-confined jets is presented. We show that the properties of the bow shock and of the gas surrounding these objects force the sources to grow in a self-similar way provided the density in the external atmosphere falls less steeply than 1/d^2. Results from observations and numerical simulations are used to develop a self-consistent model for the large-scale structure of FRII objects. The jets in these sources are shown to be stable against turbulence for the observed properties of FRIIs and the divide between FRI and FRII objects in jet power is reproduced. The overall dynamics of a source are derived as a function of time and depend on the external density, the jet power and the scaleheight of the external atmosphere. Derived dynamical ages are consistent with observed spectral ages.

Full text not available from this repository.

More information

Published date: 1997


Local EPrints ID: 14765
ISSN: 0035-8711
PURE UUID: cf733e7f-443b-48d3-b68f-92ede07f6703

Catalogue record

Date deposited: 28 Feb 2005
Last modified: 17 Jul 2017 16:53

Export record


Author: C.R. Kaiser
Author: P. Alexander

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton:

ePrints Soton supports OAI 2.0 with a base URL of

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.