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Interactions of Jets with Interstellar and Intergalactic Media

Published online by Cambridge University Press:  07 August 2017

Paul J. Wiita  and
Alexander Rosen
Paul J. Wiita
Affiliation:
Department of Physics and Astronomy, Georgia State University, Atlanta, GA 30303, USA
Alexander Rosen
Affiliation:
Department of Physics and Astronomy, Georgia State University, Atlanta, GA 30303, USA

Extract

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Jets emanating from AGN propagate first through an isothermal, but roughly power-law in density, galactic halo and then into a hotter, less dense, and uniform intergalactic medium (IGM) or intracluster medium (ICM). We use a three-dimensional boundary-following code (Mitteldorf & Wiita 1988), altered to allow for a two-phase external medium. We vary the beam power, P, the redshift, z, the radius of the galactic halo/IGM interface, Rh, the steepness of the power-law fall-off within the halo, n, and the temperature ratio of the IGM (or ICM) to the halo, Tr to estimate the average linear sizes of extragalactic radio galaxies (RGs). Good agreement is obtained with regard to the relationships between the overall linear size of such radio sources and both the total radio power (at fixed redshift) and the cosmological redshift (at fixed power). These numerical models tend to support recent analytical models (Gopal–Krishna & Wiita [GW] 1987, 1988).

Type
Part 8: Relationships of Nucleus, Galaxy and Environment
Information
Symposium - International Astronomical Union , Volume 134: Active Galactic Nuclei , 1989 , pp. 467 - 468
Copyright
Copyright © Kluwer 1989 

References

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