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          Institute: MPI für Astrophysik     Collection: High Energy Astrophysics at MPA     Display Documents

ID: 13507.0, MPI für Astrophysik / High Energy Astrophysics at MPA
Multi-frequency observations as a key to source and environment parameters of FR II objects
Authors:Kaiser, C. R.
Date of Publication (YYYY-MM-DD):2002-05
Title of Journal:New Astronomy Reviews
Journal Abbrev.:New Astron. Rev.
Volume (in Journal):46
Issue / Number:2-7
Title of Issue:Life cycles of radio galaxies - Proceedings of a workshop held at Space Telescope Science
Full Name of Issue-Editor(s):Koekemoer, A.M.; Biretta, J.A.; Perlman, E.S.; O'Dea, C.P.
Start Page:109
End Page:115
Name of Conference/Meeting:Life cycles of radio galaxies
Place of Conference/Meeting:Baltimore, MD (USA)
(Start) Date of Conference/Meeting
End Date of Conference/Meeting 
Copyright:2002 Elsevier
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:Our knowledge of the environments of radio-loud AGN is still sketchy. However, to understand the jet phenomenon it is important to know about the properties of the surroundings in which jets are formed and evolve. Here I present an analytical model of the radio surface brightness distribution of the large scale structure of FR II-type radio sources. The 'virtual maps' resulting from this model can be compared with observed maps to obtain estimates for a range of source properties from the model. These properties include parameters describing the gas density distribution of the source environment, the energy transport rate of the jets and the orientation angle of the source jet axis with respect to the line of sight. The model is tested using radio maps of Cygnus A for which there are independent measurements of some of these parameters available in the literature. The model estimates agree well with these observations. Varying the resolution of the radio maps used in the comparison does not change the results significantly. (C) 2002 Published by Elsevier Science B.V.
Free Keywords:galaxies : evolution; galaxies : individual (Cygnus A) galaxies : jets; radiation mechanisms : non-thermal; radio continuum : galaxies
External Publication Status:published
Document Type:Conference-Paper
Communicated by:N. N.
Affiliations:MPI für Astrophysik
External Affiliations:Max Planck Inst Astronphys, Karl Schwarzschild Str 1, D-85740; Garching, Germany; Max Planck Inst Astronphys, D-85740 Garching, Germany
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