Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Evolutionary tracks of FRII sources through the P-D diagram   This is the second in a series of papers presenting an analytical model for
the evolution of FRII radio sources. In this paper we evaluate the expected
radio emission from a radio source incorporating energy loss processes for the
relativistic electrons. By combining these results with our earlier dynamical
model we calculate evolutionary tracks through the Power-Linear size diagram.
These tracks are in good agreement with the observed distribution of sources in
this diagram. The effects of different forms for the evolution of the magnetic
field in the cocoon, the redshift of the source, the environment of the source
and the defining parameters of the jet are investigated. The evolutionary
tracks are found to be insensitive to the assumed form of the magnetic field
evolution. Some evidence against protons as a major constituent of the jet
material is also found.

24
The categories of this paper are: dg-ga
22
The categories of this paper are: chao-dyn
16
The categories of this paper are: stat
18
The categories of this paper are: econ
21
The categories of this paper are: adap-org
4
The categories of this paper are: cond-mat
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg