Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Relativistic Flows at the Hotspots of Radio Galaxies and Quasars?   We review the broad band properties of X-ray detected hotspots in radio
galaxies and quasars. We show that their collective properties can be unified
in a framework involving frequency dependent relativistic beaming and varying
orientations to the observer's line of sight. The simplest dynamic model
consistent with this picture is a slowing-down relativistic flow downstream
from the hotspot shock, suggesting that the jet flow remains relativistic to
the hotspot distances.

20
The categories of this paper are: acc-phys
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The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
32
The categories of this paper are: atom-ph
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
2
The categories of this paper are: math
4
The categories of this paper are: cond-mat
29
The categories of this paper are: funct-an
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The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
37
The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
22
The categories of this paper are: chao-dyn